The situation collapsed in the late Qing Dynasty and the early Republic of China. In order to overthrow the rule of the Qing court, Sun Yat-sen and other revolutionaries ran around to raise funds, but they didn't want to fall into the hands of the traitor Yuan (). Sun Yat-sen was secretly imprisoned by him, and the revolutionary party Ahua (Chen Baixiang) narrowly escaped death and sent a letter to five strangers in Jianghu for help. Therefore, Zhong Guoren (Zhong Zhentao), Du Hailun (Alan Tam), Shen Siguan (Chen You), Peng Jiankang and Fei Qiang, five extraordinary people in the Jianghu, gathered together to plan and rescue the Revolutionary Volunteers. Five people who turned right from wrong misunderstood Hua's personal letter and thought that a master named "Iron Man Sun Yat-sen" would be the biggest obstacle for them to complete their task.