Dragon Ball: Cooler's Mission After the events of Dragon Ball Super: Super Hero, Goten and Trunks find themselves facing an unexpected attack on Earth from enemies from beyond the stars. When a powerful force descends on Earth the Saiyan duo are forced into battle to help Gamma 1 defend Earth from an army filled with multiple differrent aliens. As the situation escalates they are forced to use their last resort against the leader of the army whose terrifying transformation that could spell disaster for the entire planet. Will the Saiyan duo's trump card be enough to stop the galactic tyrant.