An amateur op (detective) with a career as a former legal instructor . From the search for a runaway daughter requested by Akiko "Beppin" to the murder case. A mystery drawn with a hard-boiled touch set in Kobe (some locations in Ashiya and Yokohama ). The scenery of Kobe before the Great Hanshin-Awaji Earthquake is included in various background scenes, and you can see the buildings and scenery that can not be seen now.

Toshiki Takayama (Taka) and Oshita Yuji, who had retired as detectives and opened a private detective agency in New Zealand, returned to Yokohama for the first time in 8 years. One day, a Japanese lawyer living in Hong Kong is murdered. Taka, who felt suspicious about the incident, visits Liu Fei Long, a man who has a connection with the two in the past, but Taka is worried that Stella Lee, a business partner of Fei Long, who he met there, looks like his former lover. At the same time, a young woman named Ayaka Nagamine visited the pair at the "T&Y detective agency", asking for help in finding her mother. Natsuko, Ayaka’s mother, was an old acquaintance of Taka and Yuji. The pair started searching for Natsuko, but there was a series of murders in Yokohama. Eventually, these escalate, and a terrorist plot involving a bomb is afoot.

When a doctor is found dead and the company's exclusive data on a cancer drug is missing, detective Takayama and Oshita are called to the Nakamitsu pharmaceutical laboratory. However, a bungled attempt to catch the murderer leave Takayama and Oshita reassigned to the lackluster task of patrolling public bathrooms to keep them out of trouble.

A mother discovers that her 14-year-old daughter Yumi has leukemia and only six months to live. She decides to keep the information secret and pushes her past tutor Akira, now a university student, to reconnect with her.

After a series of arson attacks targeting red cars happens in the vicinity of Shiba Park, Shiho Kitami and Detective Hakamada of the MPD's First Investigation Division are asked by the local precinct to help with a stakeout. However, when the entire neighborhood loses power, a murder occurs...

A young woman tries to reconcile with her mother, who left their family for another man.