In the 1920s, old Shanghai was like a paradise for adventurers. Thousands of people flocked here just to realize the dream of "getting rich overnight and rising to the top". Of course, it caused great temptation, and people of all kinds came here, mixed with fish and dragons, what a chaotic and noisy place. After seven years in prison, the gambling celebrity Long Siye (played by Xie Xian) returned to Shanghai to take back everything he had lost. On the train, Long Si met more than a dozen heroes including Lan Ying, Du Baichuan, Xu Dashan, Cheng Kun (played by Huang Zhongkun). These thirteen people became brothers and went to the world together. Long Si won the first battle, defeated all the masters of Huang Hai in one battle, and took his casino for himself, and then took down the casino tycoon Qishan. It took only seven days for Long Si to dominate the Shanghai casino again. After that, he divided his casino among twelve sworn brothers. However, since ancient times, "bitterness is shared, and wealth is hard to share", the greedy Cheng Kun intends to take advantage of this to become bigger, and staged a series of vicious fights of fratricide...