In a world where everyone who wants to can have powers but with unlimited consequences, a retired soldier named Jason looks for her sister-in-law, so he can take his nephews to her. With time running fast to the end of the world, Jason does everything to make something good before everything fade...

What happens with the the people who go to another world in an isekai to save a kingdom after they save it?. They go back to their original world with all their powers? If that happens to someone who wants revenge in earth, who will be able to stop him and save us?