Slacker Scott Pilgrim leads a sweet and simple life. Until sparks fly — and ignite total chaos — when he meets the rainbow-haired girl of his dreams.

An eclectic crowd of familiar faces gathers under unusual circumstances. Elsewhere, the League of Evil Exes meets up at a secret lair.

Unfinished business, mind-blowing revelations — and a mix of lovers, friends and exes. What could go wrong?

Scott, Ramona and their friends face their toughest challenge yet in a knockdown epic showdown that could change everything.