Warned by the time traveller Trunks, Goku, Kuririn, Tenshinhan and Piccolo go forth to combat the evil androids #19 and 20! As the androids begin destroying cities, Goku challenges them to battle, pitting his Super Saiyan powers against the genius of the mad scientist Dr. Gero. But the androids aren't just tough: they can absorb energy from their opponents, becoming stronger and stronger as the fight progresses. Will the arrival of Vegeta turn the tide? Or will Earth's heroes be defeated a second time by foes who, in Trunks' future, have already destroyed them?