Martin gained recognition in the 1970s as a pop artist and composer. He wrote the songs "Bad Case of Loving You (Doctor, Doctor)", made famous by the English singer Robert Palmer, and "Cadillac Walk", made famous by the American singer Willy DeVille. Martin scored two minor hits of his own with "Rolene" (#30 Billboard Hot 100) and "No Chance" (#50), both in 1979.
Diablo is a biker gang leader executed for the murder of a young woman. A year after his death, it's time for Spring Break. Football players Skip and Ronnie head to the beach, where Skip meets Gail, the sister of the woman who was murdered a year ago. All the fun and glory of Spring Break, however, is about to turn into a living nightmare when a mysterious person in a biker outfit begins to kill people by electrocution. Could it be that Diablo has returned from the dead?
A documentary is shown on TV of group of teens who investigate the legendary forbidden zone, in which a Demon infestation once took place (see Demoni I). When finding a lifeless corpse of a demon, one of the teens causes the resurrection of it, and the demon makes it's way into the nearby world by TV-broadcast… An unlucky girl, having her birthday-party at that time, gets possessed by the demon while watching the documentary and soon the entire building in which she lives turns into a living nightmare….