The first episode of the drama series "Unsolved Cases: Metropolitan Police Department Document Investigator Season 3" (TV Asahi, Thursdays at 9 PM), starring actresses Kyoka Suzuki and Yuina Kuroshima, aired on April 16th, and it has been revealed that the average viewership ratings (according to Video Research, Kanto region) were 9.3% for households and 5.3% for individuals.
"Unsolved Cases: Tokyo Metropolitan Police Department Document Investigator" is a mystery series in which detectives investigate unsolved cases using written documents as clues. It started in April 2018, and this is the third season, approximately six years later. Amid a crisis threatening the survival of the 6th Section (Document Deciphering Section) of the Tokyo Metropolitan Police Department's First Investigation Division's "Special Investigation Task Force," the brilliant detective Narumi Risa (Suzuki) and her younger superior, the new section chief Mutsu Hinako (Kuroshima), team up as partners to tackle difficult cases.
In the first episode, we see the Metropolitan Police Department's "Special Investigation Task Force" Section 6, where document investigation professionals like Narumi Risa gather. A career officer from the National Police Agency, Mutsu Hinako, visits them and explains that while investigating an unsolved case from three years ago in which her best friend died in a mysterious fall, she acquired a used camera suspected of being connected to the case and found a film inside containing a sinister threatening letter.
Just then, a series of murders occurred using methods strikingly similar to the threatening letter! Risa and her team began to uncover the truth behind the case, starting with the "death threat made three years in the making"... and so the story unfolded.
