Throughout all the infinite timelines, one thing seemingly remained constant, Zamasu was always the Supreme Kai's apprentice within Universe 10. However, in one timeline Zamasu's peer Sozo a.k.a. the West Kai of Universe 10 achieved that honor. Underneath Gowasu's tutelage Sozo's ideals began to negatively shift after watching a mortal by the name of "Goku" fight within a tournament hosted by the Gods of Destruction from the 6th and 7th Universe on GodTube alongside his master. Sozo was appalled, sicken by the fact mortals were achieving power that only gods should possess. On that day Sozo exited a different, more jaded and bitter Kai, his ideals had completely shifted as he believed mortals shouldn't be treading into the divine realm of the gods and after a few more years of this jaded ideal growing within him, Sozo did what had to be done in order to protect the multiverse's purity. Sozo gained the super dragon balls and swapped bodies with the mortal known as Goku before then wiping out everyone within his timeline that wasn't named "Grand Priest", "Zeno", or any of the Angel's. From there Sozo, now Goku Black, traveled to the timeline of a certain blue-haired time traveler and recruited that timeline's Zamasu, even recollecting the super dragon balls to wish for the Zamasu of this timeline to become completely immortal, from there the two embarked upon their "Zero Mortals Plan." However, annoyances such as Trunks and two Saiyan's from the past kept getting in Black and Zamasu's way of bringing about their "perfect utopia", and when his immortal partner got sealed within a jar brought by that bastard Goku, Black's back was against the wall. However, just as his death was near, Black remembered the ring upon his finger and transported himself to another timeline to escape the wrath of the Saiyan's. Now finding himself within an unknown timeline, Black must recollect himself and scout this new timeline in order to survive and understand how this timeline operates.