After a childhood accident, Shiki Tohno gains the terrifying ability to see the invisible lines that bind all things together, lines he can cut to destroy almost anything. A special pair of glasses suppresses his deadly perception, allowing him to live a seemingly ordinary life. But when he crosses paths with a mysterious and dangerous woman, Shiki is drawn into a hidden world of supernatural threats. As he struggles to survive, he must uncover the truth behind his extraordinary power and the dark secrets buried in his past.