An assassin trained as a ninja carries the code name M. Hayami is a yakuza boss and a divorced father who is not allowed to come near his young daughter Mutsumi from his ex-wife Kazuko. In the big port city of Yokohama, M targets Hayami, who has angered the president of his group.

• Nikkatsu Corporation
• Reiko Ike
• Mikio Narita
• Kenji Imai
• Akiko Mori
• Masashi Ishibashi
• Shunsuke Mizoguchi
• Ichiro Kijima
• Tessen Nakahira