Shiki Toono awakens in a medical room, able to perceive invisible lines. When these fine strands, which make up all matter in Shingetsutan, are cut, they instantaneously annihilate a thing. Shiki realizes that tracing the lines of anything leads to its annihilation. Shiki continues to live his sophomore life in tranquility while keeping his magical vision hidden. This tranquillity is short-lived, however, as Shiki sees a mystery woman with blazing red eyes on his way home from school. He seems to kill the woman and then drops out as a result of a brief mental slip. As if things couldn't get any worse, Shiki is attacked by a pair of demonic dogs the next day—faced with probable death, Shiki is spared by the timely arrival of the demon hounds.