After their mother’s divorce, teenage brothers Michael and Sam Emerson move with her to the coastal town of Santa Carla, California. While Sam befriends two self-proclaimed vampire hunters, Michael becomes fascinated by Star and is drawn into the orbit of David, the charismatic leader of a mysterious motorcycle gang. As Michael begins undergoing a disturbing transformation, Sam and his new friends must uncover the gang’s secret and find a way to save him before he becomes one of the undead.