When a real-estate promoter attempts to take over the homes of two electronics whizzes and boot them out, they contrive ingenious ways to inconvenience and harass him. By pooling their knowledge, they are able to pull off a crucial robbery using a very special box of chocolates.

With angry villagers driving them away from their castle in Transylvania, Dracula and his son Ferdinand head abroad. Dracula ends up in London, England where he becomes a horror movie star exploiting his vampire status. His son, meanwhile, is ashamed of his roots and ends up a night watchman in Paris, France where he falls for a girl. Naturally, tensions arise when father and son are reunited and both take a liking to the same girl.