Saya is part human, part monster, and has one thing on her mind: revenge. Visions of twisted experiments and creatures slaughtering everyone she loved fuel her thirst for vengeance. With blade in hand and rage boiling in her veins, she tracks her tormentor to Tokyo, where flesh-hungry beasts have begun to feed. There, she joins a group of young hackers hunting for the same man. As Saya slices her way through lies, traps, flesh, and bone, how much blood will she shed to cut down the mastermind behind her madness?