Zel works mundane jobs as he pursues his hobbies. While in a deep slumber he perishes in a unfortunate gas explosion. His soul reincarnates into a new body of a medieval world. As he grows older he begins to regain some memories from his past self. His situation then turns to tradgedy as everyone he loved was taken from him. He thirsts for great power, for revenge, to protect and also to survive. Forcingly he pieces together his fragmented memories while recreating the robots from the other world.