After half a year of overcoming emotional and physical hardship, Gohan is finally being trained by Piccolo. Meanwhile, up at Kami-sama's palace, Kuririn and the remaining Z Fighters are growing impatient with Kami-sama, who after two months has still not given any lessons to his pupils. Mister Popo then takes everyone (except Yajirobe) on a mental combat simulation, using an old and mysterious mechanism inside the palace.

     There, in the middle of a long-since ruined Saiyan city, Tenshinhan and the others are attacked by two ferocious Saiyan warriors! The four of them put up a fight, but the odds are hopeless, and they are picked off one by one. Returning to the present, Kami-sama tells the team that their opponents were only half as strong as genuine Saiyans! But rather than being frightened off by this revelation, the prospects of facing such incredible warriors renews the convictions of our heroes to fight!