Daniel Matzen is a gigolo, a call boy who does his job in a purely professional manner and does not let any emotions approach him. But one day he falls head over heels in love with Kim, one of his customers. He even wants to let his gigolo job go for her, but there is someone who has something against these plans for the future: his regular customer Lisa.

Three girls summon a demon. John Sinclair, a British investigator for supernatural phenomena, travels to Germany to meet Kerstin who is the only girl left. But the demon wants to sacrifice her in the old cathedral of Cologne.