In a world where humanity triumphed in a great war against powerful rival races, a soldier named Kai trains for a future he hopes will remain peaceful. His reality is shattered when history is suddenly rewritten before his very eyes. He is thrust into a parallel world where humans lost the war and are now ruled by their former enemies. In this grim new timeline, no one remembers him; he is a ghost in a world he no longer recognizes.
Kai's only hope is a mysterious girl named Rinne, who also seems to recall the original world. Together, they must navigate this dangerous reality and fight to restore the timeline that was stolen from them. The first season has ended, but sign up for a reminder just in case it returns.