Ishikawa Ango (Oguri Shun), a young detective from the Metropolitan Police Department's Investigation Division, is a person who feels empty and lonely. When he was a patrolman, he caught the murderer near the scene and joined the criminal police team as he wished. This turning point in his life made him look forward to the occurrence of the case on weekdays. However, this time when he was patrolling near the scene as usual, he was shot in the head by a mysterious person. Fortunately, Ishikawa finally came back from the brink of death. One night, a family of three was brutally murdered. Ishikawa, who had just returned to the team, followed his boss Ichikura Takuji (Endo Kenichi) and colleague Tachibana Yuma (Aoki Munetaka) to the scene as soon as possible. When he entered the house to investigate, Ishikawa actually witnessed the ghost of the deceased after a dizzy spell. The ghost asked him to catch the real murderer. Through all-out efforts and tracking down evidence and clues, Ishikawa and his peers brought the real murderer to justice. Wandering on the border of life and death, Ishikawa, who died once, seemed to be carrying a whole new mission. He avenged the dead of the murder in a unique way, and in the process he unknowingly crossed the boundary between good and evil...