 While young Cheryl is riding the West Berlin subway, a strange man in a metallic mask hands her tickets to a movie at a newly renovated theater. She invites her friend Kathy to go with her, and they meet up with 2 young men in the lobby. A pimp and 2 of his girls are checking out displays in the lobby, one of which is a demon mask from the film. One of the prostitutes tries on the mask and is cut while removing it. While the film (a violent horror movie) is starting, the woman s wound starts oozing green slime...and in seconds she becomes a hideous, fanged & clawed demon! She attacks anyone who crosses her path, and soon the theater is filled with people turning into demons - and those trying to avoid attack. The theater exits have disappeared. Even stopping the film doesn t help, as newer demons appear. Cheryl & George (one of the young men) start a desperate battle for survival, as George rides a motorcycle wielding a samurai sword through the theater, killing demons as he goes. But will the two of them succeed in escaping the evil demons who now inhabit West Berlin s streets?