Kawai Midori's father left the family a long time ago and since her mother passed away, she has taken care of her younger siblings by herself by working with a group of itinerant camellia oil peddlers. While she is In Izu selling camellia oil, she meets a young student, Katō Yutaka, who asks her to let him take her picture. The peddlers also meet a jazz band, and when Midori sings a song, teased by the band's star singer Nanjō Haruo, the band members are enraptured by her beautiful voice. She eventually joins the band and quickly becomes a popular jazz singer.

In a warehouse area at night, a drunk chief engineer is stabbed to death by someone who whistles. After the break of dawn, two seamen join the crew of a rusty cargo ship Kaiyo Maru. One is a troublemaker with bad attitudes, Senkichi Nomura, who pursues an enemy in order to take revenge for his father's death. The other is Keizo Sasaki, a buff, eagle-eyed man on board for a certain mission.

Kitagawa, a drug control officer in the Kanto Shinetsu area, was ordered to investigate the situation of drug trafficking around Yokohama.

During the war a man is bitten by a creature which looks like a cross between a bear and an ape in the jungle. Later he starts to transform to a monster like creature who kills with his claw like fingers.

Sixth part in the Enblem of Man series.

A sequel to Detective Bureau 2-3: Go To Hell Bastards!