Much ADO about Nothing - William Shakespeare

In Messina, as Don Pedro, the Prince of Arragon, and his officers return from a recently concluded war, a message comes to Leonato that the prince intends to visit his house for a month. The Duke's party arrives with Count Claudio, who had before the war been attracted by Leonato's only daughter, Hero. Another of the visitors is Benedick, a bachelor, who enjoys speaking his mind in witty argument with Hero's cousin and companion, the Lady Beatrice. Leonato holds a masked ball to celebrate the end of the war and the engagement of Claudio to Hero is arranged while the Duke's brother, Don John, resenting the celebrations, seeks a way to spoil the general happiness. Don John plots with the soldiers, Borachio and Conrade, to deceive Claudio into believing Hero is false to him. As a result a trick is carried out with the unwitting assistance of Hero's maid, Margaret, who talks from Hero's bedroom window with Borachio at night while Claudio and the Duke watch secretly from a distance, under the delusion that the girl at the window is Hero.