Zipi and Zape are playing soccer. Zipi throws the ball with such bad aim that he breaks one of the windows of an old mansion that seemed abandoned.

They want to get their ball back and decide to enter the house. In order not to be discovered by the Genius Doctor who has his laboratory there, they decide to divert their attention by releasing the strange animals that the scientist has in cages.

But these animals turn out to be dangerous and destructive experiments that wreak havoc wherever they go. Zipi and Zape will have to catch them so that everything returns to normal.