After Goku dies from a radical heart disease and the most of the Z Fighters lose their lives, its up to Gohan and Trunks to save the world from the evil Android 18 and Android 17
Trunks trains under Gohan's mentorship and learns a powerful lesson about gain and loss. Meanwhile Bulma works to create a time machine and a cure for the deadly heart disease that killed Goku.
Trunks has learned a painful less about loss and gain. The Androids find new resolve in destroying humanity and Bulma must remain strong as the Androids attack closer and closer to Capsule Corp. and Gohan goes to fight them alone.