冷酷无情的人造人17号和人造人18号正在把世界变成灰烬，随着悟空、贝吉塔和其他Z战士的死亡，只能靠悟饭和特兰克斯来拯救未来的时间线。为了实现这一目标，悟饭必须想方设法指导少年特兰克斯并教会他在悲痛中寻找力量。这意味着徒弟必须极速成长，才可能拯救更多地球人的生命。在他们激烈作战时，布尔玛正在努力创造时间机器并且寻找治疗方法，以防止悟空在过去的时间线中死亡。即使他们无法改变未来，也能给过去带来希望。一个没有童年的小孩，一个扮演父亲角色的悲痛儿子，一个与时间作对的遗孀，迷茫的黑暗中，这个大家庭能找到希望之光吗？
With Goku, Vegeta, and the other Z Warriors dead, the merciless Androids #17 and #18 are burning the world to ash. It is up to Gohan and Trunks to save the future timeline. To accomplish this, Gohan must find a way to mentor the young Trunks and teach him to find strength in his heartache. Meaning the apprentice must grow up painfully fast to save every human life possible. While they battle, Bulma is working to create a time machine and a cure to prevent Goku from dying in the past timeline. Even if they can't change the future, they can give hope to the past. A boy must lose his childhood. A grieving son must act as a father. A widowed wife must conquer time. Through the darkness of loss, can this family find a Light of Hope?