In the forensic class, Takaji Tori (Ito Shiro) called the squad leader of the special search class Naoki Asan (Aohiko Inohara) to a Showa-style coffee shop he liked recently.Zhushou told him: “ here, career, title and age do not matter.It's like a place to stay.” Naoki looked around and saw all kinds of people from high school girls to men dressed up by office workers, to women with solemn expressions, such as Atsuko Tanaka (Ise Shima), etc.Just then, Naoki's cell phone rang - a body abandoned in a suitcase was found outside.

The victim is an elite company employee who lived in a high-rise apartment when he was young. Forensic Officer Sakuma Ryo (Miyakino Tou) found objects with blood in her room.It seems that the murderer probably killed her in the room and then transported the body out of the room.Aoyaka (Bukietsu Man) and Yezawa Hideaki (Taguchi Hiromasa) went to the apartment administrator to learn about the situation and learned that the victim had an argument with another woman about a month ago.After watching the surveillance camera, Naoki was shocked to find that it was Atsuko who he had seen in a coffee shop that had a conflict with the victim...!?The investigation shows that Atsuko's daughter worked in the same company as the victim's woman, but died of suicide two years ago.Since then, Atsuko has been prosecuted for stalking and harassment by the victim woman and was arrested for this.Since the fingerprints left on the suitcase for transporting the body were consistent with Atsuko, Naoki went to Atsuko's apartment with Murase Shiho (Michiko Haneda) and Yuma Takao (Mai Fukagawa).At her home, she was found traces of her daughter's suicide...

Will the murdered woman be associated with Atsuko's daughter's suicide?At this time, Naoki returned to the coffee shop and asked Pig Shou about Atsuko's situation. She learned that she was nicknamed “Achan” among regular customers, and had been in this store for about a year.Then, the shop owner received a call from Atsuko!She only said: “ has something unfinished... I will definitely go there again ” and then hung up the phone...

In the end, the special search class uncovered the amazing truth hidden behind complex interpersonal relationships through its perseverance in investigation.