The play is set in Verona, Italy, where a feud has broken out between the families of the Montegues and the Capulets. The servants of both houses open the play with a brawling scene that eventually draws in the noblemen of the families and the city officials, including Prince Escalus.
Romeo is lamenting the fact that he is love with a woman named Rosaline, who has vowed to remain chaste for the rest of her life. He and his friend Benvolio happen to stumble across a servant of the Capulet's in the street. The servant, Peter, is trying to read a list of names of people invited to a masked party at the Capulet house that evening. Romeo helps him read the list and receives an invitation to the party.
Romeo arrives at the party in costume and falls in love with Juliet the minute he sees her. However, he is recognized by Tybalt, Juliet's cousin, who wants to kill him on the spot. Capulet intervenes and tells Tybalt that he will not disturb the party for any amount of money. Romeo manages to approach Juliet and tell her that he loves her. She and he share a sonnet and finish it with a kiss.
Juliet's Nurse tells Romeo who Juliet really is, and he is upset when he finds out he loves the daughter of Capulet. Juliet likewise finds out who Romeo is, and laments the fact that she is in love with her enemy.
Soon thereafter Romeo climbs the garden wall leading to Juliet's garden. Juliet emerges on her balcony and speaks her private thoughts out loud, imagining herself alone. She wishes Romeo could shed his name and marry her. At this, Romeo appears and tells her that he loves her. She warns him to be true in his love to her, and makes him swear by his own self that he truly loves her.
Juliet then is called inside, but manages to return twice to call Romeo back to her. They agree that Juliet will send her Nurse to meet him at nine o'clock the next day, at which point Romeo will set a place for them to be married.
The Nurse carries out her duty, and tells Juliet