Earth is at peace after The Tournament of Power but Goku continues to train, knowing there are ever-stronger forces in the universe. With the arrival of a Saiyan warrior named Broly, Goku and Vegeta face their most dangerous challenge yet.

The Red Ribbon Army was once destroyed by Son Goku. Individuals who carry on its spirit have created the ultimate androids -- Gamma 1 and Gamma 2. However, these two androids call themselves superheroes and start attacking Piccolo and Gohan.