The First Investigative Division is the star unit of the Tokyo Metropolitan Police Department. Jun'ichi Ōiwa, the head of the division, leads around 400 elite detectives. He has an extremely heavy responsibility: attends initial investigations at the scenes of all brutal crimes that occur within the metropolis, decides on the course of action of the investigations at the same time as he directs many investigation task forces and gets into investigations himself at the critical phase. However, Ōiwa is definitely not a superman. Amid his suffering, Ōiwa overcomes this grave responsibility and is quite simply a "life-size hero" and "ideal boss" to his subordinates.

Aizawa Senba's husband asks her to get divorced after he meets his first love through facebook and wants to marry her. In order for her to get custody of her son, she decides to work at a luxurious hotel, and there she meets the young heir of the hotel, Takaoka Yuusuke, and starts to have feelings for him.

Koharu Kanashizuki, the owner of an okiya and ryōtei restaurant in the flower district of Mukojima, Tokyo, is struggling to solve a murder case.

NHK's 50th-anniversary memorial drama serial. This drama consisting of several short stories starring some of the well-known actors and actress of Japan today. A ball floats from the river's source to the sea, unlocking the portrayal of six love stories across the four seasons of the year.

Hajime Kindaichi is working a part time job as an assistant to a TV station for the filming of a shock show. They have invited celebrities in Segori Village and are planning to scare them by playing pranks on them such as fake deaths. However, a threatening letter arrives and soon, a real murder occurs broadcasted in front of everyone.