Sometimes, you may wonder what your life would look like if you had made a different decision at some point in time. That's what Zenon - the main character - does every day. He's forced to receive treatment inside a weird machine called N.E.M.O., which is supposed to be helping him recover from his partial amnesia. The space complex, however, doesn't really seem to be what it pretends to be. While Zenon is growing more and more suspicious of the events happening around him, the other part of the story takes place in his memories, where he's reliving his high school life.