Kaito's ordinary life is shattered when he's suddenly transported to a mysterious new world. With no memory of how he got there, he must rely on his wits and the guidance of an enigmatic AI companion, Echo, to survive. As he navigates this unforgiving environment, Kaito discovers that he's not alone - and that the creatures of this world are far more deadly than he ever could have imagined. With his life hanging in the balance, Kaito must confront the secrets of his past and the mysteries of this new world if he hopes to stay alive.