In the middle of Meiji, the leader of Yano team of Kyushu gamblers gang was assassinated, and his only daughter Longzi (Fujita Junko) disbanded the gang and looked around for the murderer with the wallet left beside her father's body. Longzi, with a small knife, visited casinos all over the country in the past five years, and won the nickname "Red Peony Aaron" for his excellent gambling skills. In a casino in the rock country, Longzi debunked the banker's cheating methods, causing disputes, and fortunately the stray gambler Pian Tong (Takakura Ken) stepped in to help. After breaking up with Pian Tong, Longzi learned that he had seen the whereabouts of Ah Xin, who had the appearance of the killer, so he set out to look for it, and married brother and sister with Xiong Hu team leader Huji (Ruoshan Fusaburo). Recommended by Xiong Hu, Longzi and Ah Xin went to visit the second generation leader of the Chicheng family in Osaka, Katsui Kakura (Oki Shi), but accidentally learned the truth here.