If this cleaves to slasher movie conventions, you still have to credit Hunter for thinking big. Not many no-budget movies stretch to a prison ship, or would then have the nerve to scupper it. The survivors (a handful of convicts, guards, and a token female doctor) wash up on a rocky outcrop and take refuge in a lighthouse. They have more than the elements to worry about. Leo Rook is on the loose, a headcase with a machete. With a rudimentary story and performances to match, it's nevertheless quite tense with half a dozen impressively staged set pieces.