ACT I

Rome, June 1800. Cesare Angelotti, an escaped political prisoner, rushes into the Church of Sant’Andrea della Valle. After finding the key his sister has hidden for him, he hides in his family’s private chapel. Soon, the painter Mario Cavaradossi arrives to work on his portrait of Mary Magdalene. The painting has been inspired by Angelotti’s sister, the Marchesa Attavanti, whom Cavaradossi had seen praying in the church. Angelotti, who was a member of the former Bonapartiste government, emerges from his hiding place. Cavaradossi recognizes him and promises help, then hurries him back into the chapel as the singer Floria Tosca, his lover, calls from outside. When he lets her into the church, she jealously asks Cavaradossi to whom he has been talking and reminds him of their rendezvous that evening. Suddenly recognizing the Marchesa Attavanti in the painting, she accuses him of being unfaithful, but he assures her of his love. When Tosca has left, Angelotti again comes out of hiding. A cannon signals that the police have discovered the escape, and he and Cavaradossi flee to the painter’s home. The sacristan enters with choirboys who are preparing to sing in a Te Deum celebrating the recent victory against Napoleon at the Battle of Marengo. At the height of their excitement, Baron Scarpia, chief of the secret police, arrives, searching for Angelotti. When Tosca comes back looking for Cavaradossi, Scarpia shows her a fan with the Attavanti crest that he has just found. Seemingly confirming her suspicions about her lover’s infidelity, Tosca is devastated. She vows vengeance and leaves as the church fills with worshippers. Scarpia sends his men to follow her to Cavaradossi, with whom he thinks Angelotti is hiding. While the congregation intones the Te Deum, Scarpia declares that he will bend Tosca to his will.

ACT II

That evening in his chambers in the Palazzo Farnese, Scarpia anticipates the pleasure of having Tosca in his power. The spy Spoletta arrives with news that he was unable to find Angelotti. Instead, he brings in Cavaradossi. Scarpia interrogates the defiant painter while Tosca sings at a royal gala in the palace courtyard. Scarpia sends for her, and she appears just as Cavaradossi is being taken away to be tortured. Frightened by Scarpia’s questions and Cavaradossi’s screams, Tosca reveals Angelotti’s hiding place. Henchmen bring in Cavaradossi, who is badly hurt and hardly conscious. When he realizes what has happened, he angrily confronts Tosca, just as the officer Sciarrone rushes in to announce that Napoleon actually has won the battle, a defeat for Scarpia’s side. Cavaradossi shouts out his defiance of tyranny, and Scarpia orders him to be executed. Once alone with Tosca, Scarpia calmly suggests that he would let Cavaradossi go free if she’d give herself to him. Fighting off his advances, she declares that she has dedicated her life to art and love and calls on God for help. Scarpia becomes more insistent, but Spoletta bursts in: Faced with capture, Angelotti has killed himself. Tosca, now forced to give in or lose her lover, agrees to Scarpia’s proposition. Scarpia orders Spoletta to prepare for a mock execution of Cavaradossi, after which he is to be freed. Tosca demands that Scarpia write her a passage of safe-conduct. After he has done so, he attempts to make love to Tosca, but she grabs a knife from the table and stabs him. She takes the pass and flees.

ACT III

At dawn, Cavaradossi awaits execution on the ramparts of Castel Sant’Angelo. He bribes the jailer to deliver a farewell letter to Tosca, and then, overcome with emotion, gives in to his despair. Tosca appears and explains what has happened. The two imagine their future in freedom. As the execution squad arrives, Tosca implores Cavaradossi to fake his death convincingly, then watches from a distance. The soldiers fire and depart. When Cavaradossi doesn’t move, Tosca realizes that the execution was real, and Scarpia has betrayed her. Scarpia’s men rush in to arrest her, but she cries out that she will meet Scarpia before God and leaps from the battlement.

Act 1

Inside the church of Sant'Andrea della Valle

Scene depicting a church interior with high stained-glass windows and heavy ornamental columns. The central figure is a high dignatory around whom several figures are kneeling, while in the background can be seen the tall pikes of the Swiss Guard.
Cesare Angelotti, former consul of the Roman Republic and now an escaped political prisoner, runs into the church and hides in the Attavanti private chapel – his sister, the Marchesa Attavanti, has left a key to the chapel hidden at the feet of the statue of the Madonna. The elderly Sacristan enters and begins cleaning. The Sacristan kneels in prayer as the Angelus sounds.

The painter Mario Cavaradossi arrives to continue work on his picture of Mary Magdalene. The Sacristan identifies a likeness between the portrait and a blonde-haired woman who has been visiting the church recently (unknown to him, it is Angelotti's sister the Marchesa). Cavaradossi describes the "hidden harmony" ("Recondita armonia") in the contrast between the blonde beauty of his painting and his dark-haired lover, the singer Floria Tosca. The Sacristan mumbles his disapproval before leaving.

Angelotti emerges and tells Cavaradossi, an old friend who has republican sympathies, that he is being pursued by the Chief of Police, Baron Scarpia. Cavaradossi promises to assist him after nightfall. Tosca's voice is heard, calling to Cavaradossi. Cavaradossi gives Angelotti his basket of food and Angelotti hurriedly returns to his hiding place.

Tosca enters and suspiciously asks Cavaradossi what he has been doing – she thinks that he has been talking to another woman. Cavaradossi reassures her and Tosca tries to persuade him to take her to his villa that evening: "Non la sospiri, la nostra casetta" ("Do you not long for our little cottage"). She then expresses jealousy over the woman in the painting, whom she recognises as the Marchesa Attavanti. Cavaradossi explains the likeness; he has merely observed the Marchesa at prayer in the church. He reassures Tosca of his fidelity and asks her what eyes could be more beautiful than her own: "Qual'occhio al mondo" ("What eyes in the world").

After Tosca has left, Angelotti reappears and discusses with the painter his plan to flee disguised as a woman, using clothes left in the chapel by his sister. Cavaradossi gives Angelotti a key to his villa, suggesting that he hide in a disused well in the garden. The sound of a cannon signals that Angelotti's escape has been discovered. He and Cavaradossi hasten out of the church.

The Sacristan re-enters with choristers, celebrating the news that Napoleon has apparently been defeated at Marengo. The celebrations cease abruptly with the entry of Scarpia, his henchman Spoletta and several police agents. They have heard that Angelotti has sought refuge in the church. Scarpia orders a search, and the empty food basket and a fan bearing the Attavanti coat of arms are found in the chapel. Scarpia questions the Sacristan, and his suspicions are aroused further when he learns that Cavaradossi has been in the church; Scarpia mistrusts the painter, and believes him complicit in Angelotti's escape.

When Tosca arrives looking for her lover, Scarpia artfully arouses her jealous instincts by implying a relationship between the painter and the Marchesa Attavanti. He draws Tosca's attention to the fan and suggests that someone must have surprised the lovers in the chapel. Tosca falls for his deceit; enraged, she rushes off to confront Cavaradossi. Scarpia orders Spoletta and his agents to follow her, assuming she will lead them to Cavaradossi and Angelotti. He privately gloats as he reveals his intentions to possess Tosca and execute Cavaradossi. A procession enters the church singing the Te Deum; exclaiming 'Tosca, you make me forget even God!', Scarpia joins the chorus in the prayer.

Act 2

The body of a man lies supine, with a woman, crucifix in hand, kneeling over him. A candle is placed to each side of his head.
Scarpia's apartment in the Palazzo Farnese, that evening

Scarpia, at supper, sends a note to Tosca asking her to come to his apartment, anticipating that two of his goals will soon be fulfilled at once. His agent, Spoletta, arrives to report that Angelotti remains at large, but Cavaradossi has been arrested for questioning. He is brought in, and an interrogation ensues. As the painter steadfastly denies knowing anything about Angelotti's escape, Tosca's voice is heard singing a celebratory cantata elsewhere in the Palace.

She enters the apartment in time to see Cavaradossi being escorted to an antechamber. All he has time to say is that she mustn't tell them anything. Scarpia then claims she can save her lover from indescribable pain if she reveals Angelotti's hiding place. She resists, but the sound of screams coming through the door eventually breaks her down, and she tells Scarpia to search the well in the garden of Cavaradossi's villa.

Scarpia orders his torturers to cease, and the bloodied painter is dragged back in. He's devastated to discover that Tosca has betrayed his friend. Sciarrone, another agent, then enters with news: there was an upset on the battlefield at Marengo, and the French are marching on Rome. Cavaradossi, unable to contain himself, gloats to Scarpia that his rule of terror will soon be at an end. This is enough for the police to consider him guilty, and they haul him away to be shot.

Scarpia, now alone with Tosca, proposes a bargain: if she gives herself to him, Cavaradossi will be freed. She is revolted, and repeatedly rejects his advances, but she hears the drums outside announcing an execution. As Scarpia awaits her decision, she prays, asking why God has abandoned her in her hour of need: "Vissi d'arte" ("I lived for art"). She tries to offer money, but Scarpia isn't interested in that kind of bribe: he wants Tosca herself.

Spoletta returns with the news that Angelotti has killed himself upon discovery, and that everything is in place for Cavaradossi's execution. Scarpia hesitates to give the order, looking to Tosca, and despairingly she agrees to submit to him. He tells Spoletta to arrange a mock execution, both men repeating that it will be "as we did with Count Palmieri," and Spoletta exits.

Tosca insists that Scarpia must provide safe-conduct out of Rome for herself and Cavaradossi. He easily agrees to this and heads to his desk. While he's drafting the document, she quietly takes a knife from the supper table. Scarpia triumphantly strides toward Tosca. When he begins to embrace her, she stabs him, crying "this is Tosca's kiss!" Once she's certain he's dead, she ruefully says "now I forgive him." She removes the safe-conduct from his pocket, lights candles in a gesture of piety, and places a crucifix on the body before leaving.

Act 3

The upper parts of the Castel Sant'Angelo, early the following morning

Roman panorama showing, centre, an arched bridge over a river with a domed building in the distance. To the right of the bridge is a large circular fortress.
A shepherd boy is heard offstage singing (in Romanesco dialect) "Io de' sospiri" ("I give you sighs") as church bells sound for matins. The guards lead Cavaradossi in and inform him that he has one hour to live. He declines to see a priest, but asks permission to write a letter to Tosca. He begins to write, but is soon overwhelmed by memories: "E lucevan le stelle" ("And the stars shone").

Tosca enters and shows him the safe-conduct pass she's obtained, adding that she has killed Scarpia and that the imminent execution is a sham. Cavaradossi must feign death, after which they can flee together before Scarpia's body is discovered. Cavaradossi is awestruck by his gentle lover's courage: "O dolci mani" ("Oh sweet hands"). The pair ecstatically imagines the life they will share, far from Rome. Tosca then anxiously coaches Cavaradossi on how to play dead when the firing squad shoots at him with blanks. He giddily promises he'll fall "like Tosca in the theatre."

Cavaradossi is led away, and Tosca watches with increasing impatience as the execution is prepared. The men fire, Cavaradossi falls, and Tosca exclaims "Ecco un artista!" ("What an actor!"). When the soldiers have all left, she hurries towards Cavaradossi, only to find that Scarpia betrayed her: the bullets were real. Heartbroken, she clasps her lover's lifeless body and weeps.

The voices of Spoletta, Sciarrone, and the soldiers are heard, shouting that Scarpia is dead and Tosca has killed him. As the men rush in, Tosca rises, evades their clutches, and runs to the parapet. Crying "O Scarpia, Avanti a Dio!" ("O Scarpia, we meet before God!"), she flings herself over the edge to her death.