Satan saves Joseph Ashley from death on the condition that he become his disciple (and, as it turns out, a hairy murderous beast).
Beast of the Yellow Night is a 1971 horror film, directed by Eddie Romero and starring John Ashley, who co-produced the film with Romero. It was the fourth release for Roger Corman's distribution company New World Pictures. It was released as a double feature with the West German horror film, Creature with the Blue Hand.