Much Ado About NothingDon Pedro and his men return after a war to stay at Leonato's house. Benedick continues a prickly relationship with Leonato's niece, Beatrice. Both solemnly declare they will never marry.
Claudio falls in love with Hero, Leonato's daughter. Don Pedro agrees to woo Hero for Claudio, at a reception that evening. Don John, Pedro's bastard brother, plots with his two men, Borachio and Conrade, to do some wickedness.
At the party, Claudio is told by Don John that Pedro is wooing for himself, but Claudio soon learns that this is not so, and that Hero is his. Further antagonism between Beatrice and Benedick makes Pedro and the others plan to trick them into falling in love with each other.
Leonato, Claudio and Don Pedro let Benedick overhear them speak of how much Beatrice loves him. Later, Hero and Ursula let Beatrice overhear their talk about how much Benedick loves her. Both Benedick and Beatrice find they have feelings for each other, and appear love-struck to their friends.
Meanwhile, Don John arranges for Borachio to woo Hero's maid, Margaret, at Hero's window. He informs Pedro and Claudio that Hero is going to be unfaithful that night, and arranges with them to be present. They see Borachio calling Margaret Hero, and are taken in. The Watch, led by Dogberry and Verges, prepare to carry out their evening duties. Borachio is overheard telling Conrade about the plot, and they are arrested. Dogberry and Verges begin an interrogation, but the time of the wedding arrives before they can reach any conclusions.
As the celebration begins, Claudio and Pedro reveal what they believe to be the truth about Hero. She faints, and they leave. Don John flees the estate. Leonato harangues Hero, while she protests her innocence. The priest supports her, and suggests they pretend she has died, until the truth is discovered. Beatrice and Benedick declare their feelings for each other, and Beatrice makes Benedick vow to kill Claudio for shaming Hero.
Leonato and Antonio offer to fight with Claudio, then learn the truth from the Watch. Dogberry and Verges bring Borachio and Conrade to confess before Claudio and Pedro, and Claudio begs forgiveness.
Leonato demands that Claudio mourns Hero, and in recompense marries his brother's daughter who happens to look exactly like Hero. Claudio agrees, and at the ceremony encounters the real Hero when she is unveiled.
Beatrice and Benedick stop denying each other and agree to be married. As they are all about to dance, they receive news of Don John's capture.