Dragon Ball Heroes, also referred to as Super Dragon Ball Heroes: Universe Mission, is the fifth anime installment in the Dragon Ball franchise. The anime is primarily promotional for the Dragon Ball Heroes video game and is based on the Universe Mission line that makes up the Prison Planet Saga.In Dragon Ball Super Heroes, "Trunks" returns from the future to train with Gokuand Vegeta. However, he abruptly vanishes. The mystery man "Fu" suddenly appears, telling them Trunks has been locked up on the "Prison Planet", a mysterious facility in an unknown location between universes. The group searches for the Dragon Balls to free Trunks, but an unending super battle awaits them! Will Goku and the others manage to rescue Trunks and escape the Prison Planet?