Juzo Kimura is a wandering Ronin with a past. 15 years later, after winding up in Edo, he becomes a sword teacher to support his wife and daughter. But he has a dark side to him; at night, he becomes an assassin for hire. The fates of men living double lives cross in the shadows of Edo.

Shozo Hirono has managed to separate from the Yamamori family and create his own small family, and extend his circle of acquaintances. These new friendships include a powerful underboss of the Muraoka family, Noboru Uchimoto.

Repeatedly beat to a pulp by gamblers, cops, and gangsters, lone wolf Shoji Yamanaka finally finds a home as a Muraoka family hitman and falls in love with boss Muraoka's niece. Meanwhile, the ambitions of mad dog Katsutoshi Otomo draws our series' hero, Shozo Hirono, and the other yakuza into a new round of bloodshed.

In the teeming black markets of postwar Japan, Shozo Hirono and his buddies find themselves in a new war between factious and ambitious yakuza.

While imprisoned, Tatsu encounters Danshi, a man who is a big honcho in the prison pecking order. After initial conflict they become sworn brothers. Tatsu and the sworn brothers he acquires weren’t really gangsters before their prison time, just ruffians. Prison, however, introduces them to plenty of gangland characters and three years later, they’re out of prison and enmeshed in the yakuza world.