While Monaka delivers super sweets of the Galaxy to Bulma, Trunks and Goten end up locking themselves in his truck. Finding trouble on a planet Potaufeu, Where Vegeta and Jako have to go and rescue them.
With Vegeta losing all of his power to the copy of himself that was made from Super strength water, it is up to Goten and Trunks to defeat him. Mean while Goku is back at full health and training at King Kai's planet.
Trunks has to go back to the main time-line to get Goku and his friends to try and save what is left of his world, as a new enemy much more powerful then anyone he has ever faced before now seeks to destroy all life on Earth.