The God of Destruction of Universe Seven curses because the idiots went to the future without his permission. Goku Black is the Zamasu from the current timeline, and he went to Trunks' future to team up with the Future Zamasu. Meanwhile, back in the future, Zamasu checks the Time Rings box and surprises to see that there is a new ring. Vegeta appears behind the Kaioshins, and he announces that Zamasu from the past was destroyed by Beerus. The fight resume and Black starts to gain the advantage. The reason why Black and Zamasu are working together is that Saiyans will get stronger when they face their brink of death. After each battle with Trunks, Black gets stronger due to Zamasu heals him.
Goku Black kicks the Prince flies over to Goku and others. The King feed Vegeta a senzu bean, though he is still outmatched. Black closes his eyes, and he transforms. Surrounding himself in a beautiful pink aura, The Kaioshin arrogantly calls it Super Saiyan Rose. So when a god surpass the power of Super Saiyan God, it will become pink instead of blue. Seeing the situation has changed, Goku decides to step in. Black versus Vegeta; Goku battles against Zamasu. The future Kaioshin frustrated as he tries to land a strike on the King. On the other hand, Vegeta has troubles. Black makes a heavy blow into the Prince's stomach, and Vegeta is unconscious immediately. At the same time, Zamasu reveals that he has destroyed the Super Dragon Balls after he wished for immortality.
-Even though I don't have power, I can still fight like a god- Zamasu smirks
-Are you sure?- Goku smiles as he raises his hand
Zamasu screams in pain as he is trapped inside the Energy of Destruction. Black tries to aid his counterpart, but Goku also gives the Kaioshin a purple blast. The King then use Instant Transmission to transport others to a safe location.
Goku can easily erase both of them, but he is guest of this timeline. In other words, without the King of Everything's approval of this timeline, he will create a mess with the dimensions. Trunks want The King and the Prince to go back to the past while the half Saiyan and the girl will trick the enemies.
Black and Zamasu try to find the Saiyans, but they hide their ki to avoid this. Black smirks evilly. He finds one of them; the energy of the woman.
The Kaioshins use the Instant Transmission and reappear at another location. However, they are falling into the trick. Trunks suddenly stab Zamasu and kick Black away. In a far distant, Goku and Vegeta take a final look at the teenagers before disappearing in the sky.
-Don't get so carried away brat- Black punches Trunks' face
-Damn, we let them go- Zamasu comments, the sword still on him
-Don't worry; they'll be back- Black
-Goku-san, Father, I believe in you two- Trunks smile
In the present, Mai is daydreaming about Future Trunks. The little prince trains with Shu and Pilaf. Until the machine touches down the lawn as the Saiyans go out with injuries cover on their body. Vegeta is being carried inside, and Goku explains the story after both eat senzu beans. Vegeta is pissed off at the King. He knows Kakarrot could handle both easily. Bulma also reveals a shocking truth, and that is they can only allow returning to the future for one more time. The 7th Universe's Kaioshin stands up and walks away, and Whis knows where he is heading. Goku doesn't want to say anything further, and he goes to his home with his wives, thinks about the situation.
-Really difficult. I never faced such a scenario like this- Vados comments after she listened to her husband's explanation
Marcarita isn't sure if a King of Everything of a different timeline can interfere with another timeline. It's no secret that Kings of Everything rule the dimensions, but they're not sure if Kings have authorities over the future or the past. This is unprecedented. Meanwhile, Vegeta is flying up to the lookout with madness. What's about Super Saiyan Rose? Ridiculous, The Prince of Saiyans Vegeta-sama will defeat that moron.
Back to the future, Trunks find difficulty against Black. Not to mention Zamasu who has gained immortality. Black punches Trunks' stomach and kicks him down on the ground. The Super Saiyan Rose rises and forms an energy blast in his hand. Laughing maliciously, Black is ready to kill the half Saiyan until Gowasu and Shin appear. The evil Kaioshins shock at their presence. Seeing an advantage, both of them save the mortals and move to the Kaioshin's Realm of the future.
-Was that Gowasu? And the Kaioshin of Universe 7 as well?- Zamasu asks in a neutral tone
-They must from the past. Damn, who's next?- Black curses
The four make it to a safe location. Trunks are stunned to see his mentor, the Kaioshin of Universe 7. Shin explains that he can travel through the future by using the Time Ring. Gowasu later introduces himself and bow in shame for what his student had done to the world. If he weren't choosing Zamasu, then these horrible actions wouldn't happen. While Trunks and Mai are finally having some sleep, Goku is having a conversation with his brother and Daishinkan about the issue. Daishinkan gives his son-in-law a pass, and it means the King can do anything in the future, without breaking the laws. Goku also talks about the Super Dragon Ball could not make that to switch bodies because it cannot do anything harmful to its master. The Super Dragon Balls created by Zarama for almost 100 million years ago, so there is no way the Saiyan can be its master.
Shin is working on the healing medicine. It would be great if Kibito was here. The healing magic is granted to the attendant of Kaioshins. Gowasu mentions that it was Goku's idea because he wants someone to protect the Kaioshins in case the Angel or the God of Destruction cannot make it in time. But now, the power is used for evil things. Suddenly...
-What's happened?- Gowasu asks worriedly
-Black and Zamasu are killing the remaining of Earth's people- Shin explains in rage
After seeing the Kaioshins, both Zamasu is planning to leave Earth before the Kings find out. But first, they must destroy this pathetic planet and execute absolute justice.
-Damn, I have to stop them- Gowasu shakes his head
-You can't, it's so dangerous- Shin
-After all, I am his teacher. I have to go there and convince them- Gowasu disappears
The pair eliminated almost the entire population; only some of them left. Zamasu flies down into a building to do the honor the Kaioshin of Universe 10 appears behind Goku Black. The evil Kaioshin smirks as he sees his former mentor. As the old master asks his student why he did such terrible things, an explosion occurs at the building. Black laughs because they have wiped out the entire mortals. The evil Kaioshin mocks at his master by saying in order to create a beautiful world, so the mortals must be killed. Gowasu blames himself because he doesn't show a right path for his disciple. He then asks why Black attacked other gods.
-They would never understand my ideas, so they would stop me from executing justice- Black responds
-Of course, they would stop you. I understand your love of justice, but this is wrong. Please, come back with me. We will start again. I will convince Zeno-sama and Goku-sama- Gowasu
Black stays silence. It's too late. He has gone this far, and there will be no way he will turn his back. Zamasu looks up and wondering what the two are talking about. Shin, Trunks, and Mai soon arrive. As they are about to fight, the evil Kaioshin extends his hand, and in an instant, he forms a blade to stab the mentor. Shin is outrageous after witnessing that moment. This is the third time he kills the old master. The first time was Black killed Gowasu in his timeline, the second time was he came here and killed the Future Gowasu, and now...he kills the Past Gowasu again. Black smiles evilly as the Kaioshin of Universe 10 drops down on the cold ground of dust. Meanwhile, Vegeta comes of the Hyperbolic Time Chamber with confident. As well as Goku who has trained 1 hour but actually 1000 years inside the God's time chamber designed by Daishinkan. Both Saiyans return to Bulma's house and prepare for the second round.