Scott Pilgrim vs. The World is an adaptation of the comic book series Scott Pilgrim by Bryan Lee O'Malley. 23-year-old Scott Pilgrim (Michael Cera) is the bass guitarist for the band Sex Bob-omb and has just met the girl of his dreams, Ramona Flowers (Mary Elizabeth Winstead). Scott learns that he must battle Ramona's seven evil exes, who are coming to kill him.
As Scott gets closer to Ramona, his encounters include skateboarders, vegan rock stars, and identical twins. To stay with Ramona, Scott must vanquish all of them before they vanquish him.