After leaving his 5-years old daughter Josie, astronaut of the USA government Earl Jensen is stranded in space intentionally by the head of the Department of Space. Years later, he returns to Earth. To gain the people's trust, he tells the story of the time he has spent on a planet inhabited by humanoid aliens with animal body parts. Jensen later tells he has an interest in crossbreeding the aliens to create an army of mutants, in order to exact his revenge on the Department of Space head.