After Otomi, his mistress, plunged into the sea together with Yosaburo, her lover, Genzaemon AKAMA, a boss in Kisarazu, he goes to Naka-cho in Kewai-zaka Slope in Kamakura (actually Edo) to dispel the consequent gloom, together with Mirukui no Matsu, his follower, and Heima, his bodyguard.
木更津の親分赤間源左衛門は、妾のお富が間男の与三郎と海に身を投げてしまう派目になり、憂さを晴らすために子分の海松杭の松や用心棒の平馬をつれて鎌倉（実際は江戸）化粧坂の仲町に遊びに来る。