A period of rapid economic growth. The Sanno-kai, a giant organization in the Kansai region, has expanded into Yokohama. Under these circumstances, Takamasa Ishida, who succeeded to the fifth generation Yokosuka family, is working hard to stop the movement of Sanno-kai.

Takamasa Ishida returned to Yokosuka after the war. Ishida, who met the boss Gihachiro Oshizuka and expanded his power as a substitute, decided to further play a central role in the Inamura-kai community.