After a huge scandal that ended her pop idol career, eighteen-year-old Sunny Lee spends her days longing for the past and cyber-stalking her former bandmate, Candie. When Sunny learns that Candie is attending an intensive workshop that promises stardom, she auditions and enters the program, desperate for one last shot at her dreams and a chance to mend their broken relationship. But Sunny's hopes are dashed when a hostile Candie leaves her to struggle alone through the grueling training. Things only get worse as Sunny notices eerie happenings as the workshop goes on - strange injuries and even stranger changes to her competitors bodies that quickly turn grisly as the girls begin to drop one by one. Determined to survive, Sunny teams up with her fiercest competitor, a razor-tongued mean girl, as they race to expose just what's behind the carnage. But when traumatic memories resurface and ghostly apparitions start haunting the halls, Sunny begins to question everything and everyone, including her own unravelling mind.