Pierre Renard is the blackboy of the writer George Vallier. At the time of a reception, the Italian actor Aldo Barazutti takes him for the writer and proposes to him to come to work with him in Tunisia with the development of a scenario. In fact Barazutti wants only to flee her wife to find her...
A postman in a small mountain village finds a woman and her son both dead in the "grotte aux loups" (cave of wolves). He soon begins to realize than it's not natural death, and that someone in the village in behind their murder, while tragic events occur.
The film follows the villain “The Serpent” in his fight to conquer the world at any cost. Close to the best B series, Yaccelini runs through its plot of scientists, chases and highly suspenseful endings, aware that the most intense adventure is the one that never manages to hit the brakes.
