Gohan is continuing his training under Piccolo. One night, Gohan suddenly transforms to a giant ape again and attacks Piccolo! Piccolo discovers that a moon image is projected from Goku's old Saiyan space pod and Piccolo must destroy the pod before Gohan destroys him! Meanwhile, Goku finally reaches King Kai's small planet at the end of Snake Way. There, Goku finds that he must train in the gravity of a planet that is ten times stronger than Earth's!