Rosaline is an independent-minded, unconventional young lady from the House Capulet. She has been secretly seeing
Romeo, a member of the Capulets' rivals, the Montagues, and arranges to meet him at the Capulet masquerade ball. Rosaline misses the ball after a meeting with a potential suitor, Dario Penza, introduced by her father, leads to them becoming trapped on a boat in a storm and she rudely rejects his courtship; meanwhile, at the ball, Romeo meets and becomes smitten with Rosaline's cousin
Juliet. Next day, after Romeo does not arrive to see her, Rosaline follows him and sees him wooing Juliet. Lord and Lady Capulet call on Rosaline's father Adrian, taking with them Juliet and her cousin
Tybalt. Rosaline tells Juliet that she knows of Juliet's romance with Romeo and lies about Romeo romancing many other women. Then, she takes Juliet out to a cheap bar to meet men, hoping to make her forget about Romeo. Rosaline becomes dismayed when Romeo does not reply to her letters. She then discovers letters he has written to Juliet, which she takes. Finding Juliet expecting Romeo, Rosaline encourages her to reject him and he leaves, but Juliet sees Rosaline's necklace engraved with Romeo's and Rosaline's names and realizes that her cousin has lied to her. Rosaline convinces her friend Count Paris that he can distract attention from his
homosexuality by courting Juliet; the Capulets heartily accept the suit, much to Juliet's dismay. Rosaline finds a letter from Romeo to Juliet asking her to
elope with him. Rosaline grudgingly accepts Dario as an escort when she ventures out to infiltrate the Montague estate after dark, intending to stop the wedding, but they are seen by guards and pursued; after Dario fights off the guards, they escape on horseback, but fail to stop the wedding. Rosaline's attitude to Dario softens, but Dario tells Rosaline he will be leaving next day to rejoin the navy. Accepting what has happened, Rosaline sends Romeo's letters back to Juliet, but her message is intercepted by Tybalt who challenges Romeo to a duel. Romeo kills Tybalt, and both fathers angrily demand that Romeo and Juliet's marriage be annulled, and declare war on each other. Rosaline goes to apologise to Dario and asks him to help Romeo and Juliet leave the country in his boat. They go to Juliet's room to tell her, only to learn that Juliet has already carried out her plan to fake her death by drinking a potion. Later, Rosaline arrives at Juliet's body to find Romeo with her but still alive, as Dario had informed him of the plan. Rosaline tells Romeo to also pretend to be dead, and scolds the arriving Montagues and Capulets for having caused this by their feud. The families reconcile and depart. Rosaline and Dario see Romeo and Juliet off in Dario's boat before sharing a kiss. In a
mid-credits scene, Romeo and Juliet on the boat trip struggle to find common interests. ==Cast==