One man finds that all the myths about monsters – be it in English, European or Chinese stories – are true. Once these monsters populated the earth again and again and for every monster there was a hero who fought against it. But suddenly they have disappeared from our world. During his research, he suddenly ends up in a parallel world where all these monsters are. And finally, he has to realize that they will come back to Earth where they could destroy everything. New heroes are needed to stop them.