
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.
Cast

Yūji Hori
Detective Nagata

Rinichi Yamamoto
Detective Kaneko

Shoji Nakayama
Detective Yamagata, Unknown

So Yamamura
Maruyama

Takashi Kanda
Chief Investigator
Ryuichi Fujiyama
Cleaning Shop Owner, Unknown

Kin Sugai
Unknown

Sakae Umezu
Unknown

Kan Yanagiya
Unknown
Fusatarō Ishijima
Unknown

Kyoko Shinobazu
Unknown
Masahiko Naruse
Unknown

Kenji Imai
Unknown

Akiko Santo
Unknown

Tokue Hanazawa
Unknown

Ken Sudo
Unknown
Koji Sahara
Unknown
Fujie Satsuki
Unknown
Kazuo Okino
Unknown
Keiji Aoyama
Unknown
Shiro Okamoto
Unknown
Hideharu Koganei
Unknown
醍醐都子
Unknown
Akemi Nara
Unknown
Tomiko Makinouchi
Unknown
Sanae Mitsuoka
Unknown
Yoshikazu Sugi
Unknown
Teru Kobayashi
Unknown

Tetsuo Uematsu
Unknown
Kazuko Namiki
Unknown

Machiko Yashiro
Unknown

Fumitake Ōmura
Unknown
Komadori Sisters
Folk Song Sisters

Kōji Sekiyama
Unknown