A prison ship on its way to a remote island prison runs aground on rocks and sinks. Mixed survivors of cons and prison guards struggle ashore, only to discover to their horror that another survivor has made it ashore before them. Murderous psychotic, Leo Rook, who not only had a hand in the ship's sinking but has decapitated all but one of the island's lighthouse crew. Stranded, with no means of escape or call for help, the survivors must face a night of terror as they know that since they've learned that Leo survived going down with the ship he can't let any of them live and is hellbent on adding their severed heads to his collection.