As a series of murders reminiscent of a past case resurfaces in 1999, Shiki Ryougi and Mikiya Kokutou feel the weight of their grim history. Suspected due to her connection to past incidents and a chilling resemblance to the killer, Shiki's hidden violent tendencies resurface. Determined to clear her name, Shiki and Mikiya embark on a quest to uncover the true culprit. Amid their separate pursuits, Mikiya's fears for Shiki's well-being intensify, propelling him to race against time to protect her from herself. Guided by his cousin, detective Daisuke Akimi, Mikiya delves into the dark underbelly of Mifune City, where the key to saving Shiki's soul rests in proving her innocence beyond doubt.