When Lian Ye, hall master of the Sanshan Gang, loses his whole family in a massacre, he teams up with childhood friend Li Mingyuan, deputy police chief of Rongcheng, and Chen Dieyi, proprietress of the Huamoli Cabaret, to investigate and avenge. They uncover a web of eerie cases spun by Japanese spy mastermind Matsui Jiiichiro to penetrate Rongcheng, battling the invaders and putting their lives on the line to protect their country.