Detective Yugami, a quirky and unconventional investigator, partners with the ambitious rookie Hanyu to solve the suspicious death of a female college student, uncovering a web of secrets involving harassment and a mysterious suspect.
Yugami and Hanyu investigate an attempted rape case involving a middle school teacher, Chisato, who was attacked in her apartment. Although Chisato refuses to cooperate, the detectives discover a connection between her and a student.
Yugami and Hanyu investigate the attack on Sergeant Masashita, a beloved officer found unconscious in the mountains just before his retirement. Hanyu vows to catch the culprit responsible for harming his respected mentor.
Yugami and Hanyu investigate the death of an architect who fell from an unfinished building. The investigation reveals a love triangle involving the victim, his fiancée, and a colleague who claims self-defense during a confrontation.
A kidnapping case involving the daughter of a prominent family is marked by a symbol linked to a past murder inspired by a sinister novel. The author of that novel, who used the same symbol, was once apprehended by Yugami.
A young IT entrepreneur is attacked at a planetarium after posting about his visit. The victim has many enemies, including a telescope maker whom he drove to bankruptcy. The detectives suspect a connection with a game app and its creator.
The detectives investigate the poisoning death of Sugano's friend, Eriko. Despite her seemingly happy life, it's revealed that she was struggling with a demotion. As they dig deeper, they uncover a dark secret that complicates the case.
Yugami, feeling down about his favorite racehorse's retirement, takes Hanyu to a nightclub where they encounter a former thief, now trying to live an honest life. A few days later, she is found dead with a large sum of money.
A wealthy former doctor is found murdered in his home, with a cryptic note suggesting revenge as the motive. Despite the similarities to a crime depicted in an unfinished novel, Yugami suspects the doctor's long-lost son might be involved.
Yugami vanishes after visiting a hospital where Hizumi is in a coma. Meanwhile, Hanyu and the team discover that the supposed dead author, who was responsible for the murders years ago, may still be alive and behind recent crimes.