The Welsh nutters, Dirty Sanchez are making a movie: The concept of the film is that the Devil has heard about the dare devil nature of the Sanchez boys so he's set them the ultimate challenge, to complete stunts based on the 7 Deadly Sins or be damned to the gutter forever.

Nobody knows where they came from. They parasitize in human beings, take control of them and change their bodies into hideous monsters (Necro-borg). The Necro-borg fight each other until the other dies. Where did they come from? To what end? Yuji and Kaoru, whom both have dark secrets within themselves, get caught up in the horrific battles of Necro-borg. What will their fate be?