In the year 1963, in the fictional Kurashima City, two yakuza gangs - the originally Osaka-based Kawade under Kasumi Kawade, who use political connections in local assemblyman and ex-yakuza boss Masaichi Tomoayasu to further their activities, and the Ohara, under acting boss Kenji Hirotani, who have an alliance with the local police - are battling for local supremacy.