A woman capable of murder watches herself become the prime suspect in murders she didn't commit, and the only person keeping her tethered to humanity is the one person she might kill. The film turns investigation into psychological warfare, each clue a mirror held up to Shiki's fractured psyche instead of a path toward truth. By the end, you realize the killer was never the point, whether Shiki stays human was always the only question that mattered.
Four years after their first encounter amid a string of brutal murders, Shiki Ryougi and Mikiya Kokutou face a nightmare returning to haunt them. New killings have surfaced in Mifune City that mirror the old crimes, and suspicion falls directly on Shiki. She's the connection between past and present, the only witness who knows what really happened back then. What makes this worse is that Shiki can feel something dark stirring inside her, an urge to kill that she thought she'd buried. Mikiya knows her better than anyone, but he's terrified of what she might become if that darkness breaks free. Working parallel investigations, they hunt for the true killer while racing against time and Shiki's own fractured psyche. The case pulls them deeper into Mifune City's criminal underworld, where every lead brings them closer to a truth that could destroy everything they've built together. What begins as a murder mystery becomes a desperate race to save Shiki from herself.