Shiori Yamauchi finds a letter in her mailbox addressed to a Reiko Miura, who seems to be the previous occupant of her condo unit. She opens the letter out of curiosity. In it were the words, "I want to see you. I love you." A few days later, another letter arrived with the words, "I'll come and see you today after a long time." Scared, Shiori did an internet search for "Reiko Miura" and found out that she was the victim of a stalker murder that happened a year and a half ago.
Hikari Takabayashi is a hardworking call center agent for a home appliance company who apologizes continuously to customers, even to rude callers who call just to verbally insult her. She does, however, hide a secret. A love affair with her married boss. One day she was asked by one of her junior colleagues Mika, to take a call from a middle-aged woman named Kazuyo Miyawaki who calls frequently. Upon returning home exhausted after dealing with the caller, she noticed the nameplate on her neighbor's door, "Kazuyo Miyawaki"...
The First Investigation Division of the Metropolitan Police Department, which is based in the Dai-Tokyo Police Station , is headed by Keiichiro Funakoshi, the Chief of the First Investigation Division . This is a department that specializes in considerations that lead to solutions.
Along with Ryu Fujii , a new detective who was newly assigned for some reason , they lead to the solution of many difficult cases one after another while colliding with each other's strengths.