The Duke's Departure and Angelo's Rise
Duke Vincentio of Vienna announces he will leave the city, giving control to his deputy, Angelo, a man known for severe piety and strict morals. Vincentio claims he needs to travel but secretly stays in Vienna, disguised as a friar named Lodowick, to watch Angelo's rule and the city's condition. He believes his own loose enforcement of laws caused moral decline and wants to see if Angelo's strictness can reform the people. Escalus, an older, more moderate counselor, is appointed to help Angelo, but Angelo quickly takes charge and ignores Escalus's pleas for leniency.
Claudio's Condemnation
Angelo, determined to prove his strictness and reform Vienna, immediately targets Claudio, a young man who impregnated his fiancée, Juliet, before marriage. Even though they plan to marry and are legally 'contracted,' Angelo uses an old, unused law against fornication, sentencing Claudio to public execution the next day. This harsh judgment shocks the city, showing Angelo's unforgiving nature. Claudio's friend, Lucio, a witty but talkative man, is horrified by the severity and decides to find help for Claudio, knowing his sister, Isabella, is about to join a convent.
Isabella's Plea
Lucio visits Isabella, a virtuous novice about to take her vows, to tell her about Claudio's situation and beg her to speak to Angelo. Initially hesitant because of her humility and sacred calling, Isabella eventually agrees, driven by love for her brother. She goes to Angelo, passionately arguing for mercy, emphasizing that humans make mistakes and that forgiveness is divine. Angelo, at first unyielding, starts to feel a strange, strong attraction to Isabella's purity and words, which he struggles to reconcile with his strict moral image. He dismisses her, telling her to return the next day.
Angelo's Temptation
When Isabella returns, Angelo reveals his true, corrupt intentions. He tells her he will spare Claudio's life only if she gives up her virginity to him. Isabella is horrified and outraged by this offer, seeing it as a monstrous twisting of justice and morality. She firmly refuses, saying she would rather see her brother die than sacrifice her honor. Angelo, confident in his power and her inability to expose him without incriminating herself, dismisses her, leaving her in despair. He believes his reputation is unassailable and that no one would believe her accusations against him.
Isabella Informs Claudio
Distraught, Isabella visits Claudio in prison to tell him about Angelo's vile proposal. She expects him to support her decision to protect her chastity. Claudio is at first resigned to his fate, but as Isabella describes the horror of Angelo's demand, a flicker of hope for life makes him waver. He begins to beg Isabella to sacrifice her honor, arguing that a momentary stain is better than death. Isabella is disgusted by his cowardice and selfishness, fiercely scolding him and declaring she would rather he die than she commit such a sin. The disguised Duke Vincentio overhears their talk.
The Duke's Intervention: The Bed Trick
The disguised Duke Vincentio, having overheard Isabella and Claudio, steps in to offer Isabella a solution. He reveals that Angelo was once engaged to a virtuous lady named Mariana but abandoned her when her dowry was lost at sea, claiming a flaw in her reputation. The Duke proposes a 'bed trick': Isabella should agree to Angelo's demand, but Mariana, still in love with Angelo, will secretly take Isabella's place in the dark. This plan aims to satisfy Angelo's lust, protect Isabella's virtue, and prove Angelo's hypocrisy, leading to his downfall and Mariana's restoration.
The Deception and Angelo's Duplicity
Isabella agrees to the Duke's plan and arranges to meet Angelo. Mariana, disguised and veiled, takes Isabella's place in the tryst. The bed trick works, with Angelo believing he has slept with Isabella. However, Angelo, fearing exposure and determined to cover his tracks, immediately breaks his promise. He sends orders to the prison for Claudio to be executed at once, demanding his head be sent to him, intending to eliminate any potential witness or source of future blackmail. The Provost, the prison keeper, is troubled by this sudden, cruel order.
The Provost's Dilemma and the Duke's Rescue
The Provost, knowing the Duke's original intention was mercy and troubled by Angelo's sudden harshness, hesitates to execute Claudio. He receives a letter from Angelo demanding Claudio's head by 4 AM. The disguised Duke, aware of Angelo's betrayal, intervenes. A pirate named Ragozine, who looks very much like Claudio, has died in prison of a fever. The Duke tells the Provost to send Ragozine's head to Angelo instead of Claudio's, saving Claudio's life while still fulfilling Angelo's demand for a head, thus buying more time to expose Angelo publicly. Claudio is kept hidden.
The Duke's Return and Public Accusations
The Duke, having arranged his 'return' to Vienna, prepares for a public hearing. He tells Isabella to publicly accuse Angelo, promising to support her claims. Isabella, Mariana (also veiled), and the disguised Duke (still in his friar's habit) await the Duke's arrival. When the Duke appears in his true identity, Isabella bravely steps forward to accuse Angelo of attempted sexual extortion and betrayal of justice. Angelo strongly denies the charges, confident that Isabella has no proof and that her story will be seen as madness. Mariana then steps forward, revealing her identity and the bed trick, further implicating Angelo.
Angelo's Exposure and Punishment
The Duke, still pretending to investigate thoroughly, at first acts as if he disbelieves Isabella and Mariana, even having the disguised Friar Lodowick (himself) arrested for slander. Lucio, unaware that the friar is the Duke, slanders the Duke, further digging his own grave. Eventually, the Duke reveals his true identity, shocking everyone, especially Angelo. Faced with undeniable evidence and the Duke's direct knowledge, Angelo confesses his guilt. The Duke sentences Angelo to marry Mariana and then to death, mirroring Claudio's original sentence, to show that justice is served according to the 'measure for measure' principle.
Mercy and Resolutions
Mariana, deeply in love, pleads with Isabella to speak for Angelo's life, and Isabella, showing great mercy, eventually does. The Duke, having tested their compassion, pardons Angelo, allowing him to live with Mariana. He then reveals that Claudio is alive, much to Isabella's joy and astonishment, and reunites him with Juliet. As the play ends, the Duke, having restored order and shown his wisdom, proposes marriage to Isabella, acknowledging her virtue and her role in exposing corruption. Lucio is punished for his slanders by being forced to marry a prostitute he impregnated. The play ends with a series of marriages and a renewed sense of justice and order in Vienna.