The Devils Nightmare (1971)_aw

In 1945, in Berlin, the wife of Baron von Rhoneberg dies in the delivery and he stabs his newborn daughter to death. In the present days (1971), the tourist guide and driver of a bus Ducha finds a road closed and is forced to take a detour. He seeks a place to spend the night and a man on the road tells that Baron von Rhoneberg is a great host and they may stay in his castle. They are well received by his butler Hans and they go to their rooms. The grump Mason; the seminarian Alvin Sorel; Nancy and her unfaithful husband Howard; and Corinne and her friend Regine meet to have dinner with the Baron and they learn that his family has a curse and the first-born daughter of each generation turns into a succubus. Further, this day is the anniversary of the curse, but the guests believe it is a legend. Out of the blue, the beautiful and sexy Lisa Muller arrives in the castle and joins the group to have dinner. Soon a succubus appears to steal the soul of her victims for the devil.