Gretta (Keira Knightley) and her songwriting partner/lover Dave (Adam Levine) head for New York when he lands a record deal with a major label. However, Gretta is suddenly left on her own when Dave gives in to the temptations that come with his newfound success. Things take a turn for the better for her when Dan (Mark Ruffalo), a disgraced record executive, discovers Gretta performing in a club. A mutually life-changing bond forms between the pair as they work together on Gretta's first album.