An elderly woman, Ume Matsumoto, informed the First Investigation Department that her son Hirasaka, who runs a shoe store, had disappeared. The detectives had a bad feeling which hit the mark, an unidentified drowned body is identified as Hirasaka. Some prime real estate he owned was also mysteriously sold. Suspecting that this is a planned murder and fearing the escape of the criminal, the Department begins to investigate secretly, without creating an investigation headquarters.

Yūji Hori
as Detective Nagata

Rinichi Yamamoto
as Detective Kaneko

Shoji Nakayama
as Detective Yamagata

So Yamamura
as Maruyama

Takashi Kanda
as Chief Investigator

Ryuichi Fujiyama
as Cleaning Shop Owner

Kin Sugai
as

Sakae Umezu
as

Kan Yanagiya
as

Fusatarō Ishijima
as