Eguchi Yosuke plays the character of Onishi Katsuo, a 35-year-old carpenter and former college football player who sees life almost in the same balance as a football game (guts and glory along with team spirit). One day he learns that his friend (a college football teammate) was killed when his house burned down. His friend's wife is in a coma and his four kids are now homeless, Eguchi has the children live with him (in his one room apartment) above his bosses home.

A man identifies himself as “Kizoku” ("Aristocrat") and works as a private detective for a hobby. Nobody knows his age, address or anything about his family. The actual deductions and investigations are carried out by his employees including his butler, maid and chauffeur. He only has a good time talking to the women involved in the cases. Meanwhile, Aika Takatoku works as a private detective. She competes with the Aristocrat Detective to solve cases.

Asagao (Juri Ueno) is a rookie forensic scientist, who works at a university forensic medicine class in Kanagawa Prefecture. She is a licensed doctor and respected by those around her. Asagao lives with her father Taira (Saburo Tokito), who is a veteran detective. Asago's mother died in the 2011 Tohoku earthquake disaster and her mother’s body was never found. One day, Asagao’s forensic medicine class unexpectedly works with the investigation section of the police department. When a dead body is found, the dead body is transferred to Asagao’s forensic medicine class. Asagao now works with her detective father.

Shiga Michinari was a well-respected deputy editor-in-chief of a major publishing company "Shukan Shuncho". However, his reputation and happiness hit the bottom when his son Kensuke was involved in a stalker's murder case and later committed suicide. People around Michinari suddenly became cold to him. He was demoted and abused by the company and reporters. In addition, his daughter Nanami became violent while his beloved wife couldn't handle the pressure and left home. Michinari could no longer stand the situation and decided to investigate the incident which Kensuke was involved in.