It has been several years since Cell was defeated and the Z Fighters have returned to living normal lives; Goku continues training in the Other World, Krillin has gotten married, and Gohan is trying to survive high school. That changes with the new World Martial Arts Tournament about to start, which leads the Z Fighters to reunite to try to compete against Earth's greatest warriors. A bigger challenge comes up for the group when evil wizard Babidi travels across the galaxy seeking revenge -- he wants to fulfill his father's thwarted dreams of achieving universal domination. The Supreme Kai recruits the Z Fighters to try to prevent Babidi from unleashing terror on the world.