Mae, a fascinating young girl, has an unusual beauty. Caleb meets her on a summer night and tries to seduce her. But she seems scared by the coming dawn and refuses to give in to him. He agrees to take her to her home in exchange for a kiss. But this one turns into a bite which leads Caleb into Mae's friends' frightening world. Like her, he is now condemned to wander every night in search of the victims on whom his survival depends...