After an alien invasion wipes out his family, Kiyoshi Kazuki is left with nothing but a burning hatred for the creatures that stole his world. As he sets out on a path of vengeance, Kiyoshi must claw his way through betrayal, brutal training, and inhuman enemies—only to learn that revenge demands more than rage. Every step forward forces him to confront what he’s willing to sacrifice… and what remains of his humanity.