With a warm heart and an eye for women, the private detective in this program is barely scraping by. If it were not for the grudging support of his younger brother, he would never find his way out of the trouble caused by his well-intentioned meddling in the affairs of other people.

It all started when Takashi (Takenouchi), a talented composer who could not write a love song ever since his girlfriend Rina left him suddenly, accidentally sent an uncompleted piece of his latest work to Amane (Tanaka) via email. Deeply touched by his music, Amane wrote back to him, without getting a reply. Amane continued writing to him, pouring out her thoughts. Only when she signed as "Teru Teru Bozu", did Takashi responded with a mail saying "WHO ARE YOU?", because what Rina left him as a farewell gift was a teru teru bozu!

Detective Ukyo Sugishita confronts crime on the basis of his own convictions. He has a partner that works for him in the Special Task Unit. For the first 7 seasons, Ukyo’s first partner is Kaoru Kameyama. He is a good-natured, hot-tempered, straightforward and somewhat scattered detective. Beginning in Season 8, Takeru Kanbe replaces Kameyama. Contrary to his predecessor, Takeru is a lanky, cool, conceited and confident detective. From Season 11 to Season 13, Ukyo’s partner is a young detective Toru Kai. Toru is a son of Deputy Director-General of The National Police Agency. But he became a detective by his own effort. And starting with Season 14, Ukyo’s current partner is Wataru Kaburagi, an elite bureaucrat who came to the Metropolitan Police Department on temporary assignment. As the first partner without any career of a police officer, he will face challenging cases together with Ukyo.

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

Continuation of the popular series of films about the assassins in Edo. This show marks the return of the jidaigeki series "Hissatsu Shigotonin," which has had several seasons between the 1970s and the 1990s. The franchise came back in 2007 with a one-shot special, but this is its first full season since 1992. Makoto Fujita returns as the protagonist Nakamura Mondo, one of the "shigotonin," a team of hired assassins.