Hae-won needs to get away from it all and finds herself drawn to Moo Island where she once spent an idyllic childhood holiday. On arrival she's reunited with her old friend Bok-nam. Hae-won soon discovers that the island paradise hides a darker more grotesque society. The hapless Bok-nam is ritually abused by the island's population. With nothing left to lose Bok-nam begins a reign of gruesome blood-drenched revenge.