In the course of their trip at sea, the five friends encounter a terrible tempest and their boat is wrecked on an island. Yugo, Amalia and Evangelyne disembark in search of food, but primitive Sadida take them in hostage: these are Kaniboules! And it... (more) seems that they have the poor habit to give the foreigners in sacrifice in their godhead: big Moon... This smells bad for our heroes!