Karin brings a statue home from her travels to Asia and it soon begins to have a strange effect on her. She has an insatiable sexual appetite and develops strange fetishes such as pain and death. Soon, she gets out of control and only her boyfriend Matt has the power in his love to exorcise the demon spirits from Karin's body.

Set in 1959, Diner shows how five young men resist their adulthood and seek refuge in their beloved Diner. The mundane, childish, and titillating details of their lives are shared. But the golden moments pass, and the men shoulder their responsibilities, leaving the Diner behind.