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In 1898 AD, due to Yuan Shikai's betrayal, the Reform Movement of 1898 failed, and Emperor Guangxu was imprisoned by Empress Dowager Cixi in the YingTai. Lu Er, a generation of masons who repaired the Imperial Palace, in order to complete the remaining project of the Old Summer Palace under the guise of the Flower Band's styling in the play, tattooed on his body the plan secretly plotted by Emperor Guangxu, and entered the Heavenly Prison under the pretext of robbing a money shop to rescue the Grand Secretary. Xu Sandao, a Tianjin thug, was beaten up by Hongzhong's Red South City and his East-West-North-South Storm over territory disputes. When he found an opportunity to assassinate Hongzhong, he was mistakenly captured by Chief Holmes as a reformist rebel and thrown into the Heavenly Prison.

Inside the Heavenly Prison, assassins broke in to kill the Grand Secretary but accidentally helped Lu Er rescue him instead. Xu Sandao also took the chance to escape.

Outside the casino, Lu Er was mistaken for causing trouble while putting up posters and was dragged inside. Chief Holmes, who came to capture the fugitives, had a misunderstanding with Hongzhong and others, resulting in them being beaten up by Hongzhong and the East-West-North-South Storm. The offending Hongzhong and the East-West-North-South Wind could only run away, only to end up staying at a black inn operated by their rival Xu Sandao. Unexpectedly, Hongzhong’s subordinate Dongfeng discovered that Lu Er and the Grand Secretary were also staying at this inn, and that Lu Er's tattoos concealed a massive secret about a treasure. Meanwhile, Xu Sandao and the madam were conspiring a crazy plan...

At a Tianjin brothel, Pirate No.7 from Singapore was waiting for Lu Er to send the Grand Secretary overseas, unaware that Holmes and Japanese ninjas had already received the news and laid an ambush there. Hongzhong and his subordinates also tracked them down. Unaware of the situation, Lu Er and the Grand Secretary hurriedly arrived and discovered Yuan Shikai drinking and reveling. Enraged, the Grand Secretary insisted on personally killing Yuan Shikai to avenge the reformists, and Lu Er reluctantly agreed to assassinate Yuan Shikai. Just then, they saw Huo Yuanjia...