Earth in 2201, the most brilliant inventors of the Skynet organization have created a machine that can travel through space and time. Our main character, Yasuo, is on a mission to join this journey. However, a big explosion happened, and Yasuo, lost in time, arrived in a strange place where dangerous monsters were always waiting, survival was the ultimate goal. In the journey to find his way back home, in addition to surviving before the hordes of aggressive monsters, a horrifying truth is gradually being revealed... this is the future Earth, and he is forced to find a way to save the Earth from this horde of monsters.