An accident happened to an ordinary four people. As we all know, in the world of novels, if there is an accident, it must have traveled through time, so the souls of these four people traveled to a different world.
And they have to live in this different world. Of course, it is not easy. The ancient gods who destroyed the world, the technology of pre-civilizations, weird alien creatures, and the internal struggles of local indigenous people are all what they have to face. So I wish you a safe journey. (The author's writing is a bit bad, please forgive me)