The trio arrive on the planet and meet an alternate version of Goku, who is revealed to be part of a group called the Time Patrol. A mysterious figure emerges, introducing himself as Fu he tells Goku, Vegeta and Mai that Future Trunks is trapped on a world called the 'Prison Planet', a planet where warriors from alternate timelines and dimensions fight as part of an experiment conducted by Fu. Goku and Vegeta's training with Whis and Beerus is interrupted by the arrival of Future Mai, who tells them that Future Trunks has been captured.
