Contract killer Saito is forced into a low-level job in Hakata, a ward of Fukuoka, Japan; private detective Banba probes another detective's suspicious death, which points to the mayor.
Lin decides to protect Banba while he seeks revenge on his former employer, Zhang; Jirou and Misaki mistake Saito for someone else, with brutal consequences.
Jiro looks for the real killer to clear Saito's name; Lin receives devastating news that hardens his resolve to get back at Zhang.
Lin learns the identity of the one who killed his sister; Banba and Lin devise a trap for the enemy.
Banba takes time off to relax at the Yamagasa Festival; a skilled assassin moves to Hakata to find more challenging work.
Saruwatari decides to make the Niwaka Samurai his next target; with Banba away at the festival, Lin fills in for the Niwaka Samurai and ends up in over his head.
Daisuke Ono
Zenji Banba
Yuki Kaji
Shiemmin Rin
Daisuke Namikawa
Jiro
Kensho Ono
Enokida
Yūki Aoi
Misaki