Em dezembro de 1941, o Japão decide expandir sua dominação a países vizinhos para o Sudeste Asiático, e acabam tomando a estrada de ferro de Tianjin para Nanjing, no leste da China, transformando-a em uma rota de transporte militar vigiada por soldados armados. Inconformado, o trabalhador ferroviário Ma Yuan (Jackie Chan) vai liderar uma equipe de lutadores em busca da da liberdade do local. Usando seu profundo conhecimento sobre a rede ferroviária, ele e seus homens vão iniciar uma guerra por justiça.
A rental house in Shanghai caught fire. Yu Shengnan, a female professor at the Medical University, found a woman's body very suspicious, so he quickly called the chief inspector Zhong and his partner Han Fei. After preliminary autopsy and on-site investigation, Katsuo and Zhong Lang concluded that the deceased was murdered before the fire...
In the old Shanghai before liberation, forces from all sides gathered here, and they grew up and down, rampant and domineering. The two major underworld forces, the Qinglong Gang and the Qilin Gang, often fight for supremacy, and blood splatters on the streets. One day, three members of the Qinglong Gang were dead on the street.
On a quiet day, Abin, a boxer who claims to be a friend of Zhong Lang, called the laboratory of St. John's University and asked Yu Shengnan to tell Zhong Lang that there was an important life-threatening matter to him.
Prices are soaring, gangs, warlords, and foreigners are rampant and domineering. The oppressed and bullied people most hope that justice will come. So a group of righteous and brave young people stepped forward and used their wisdom and faith to disperse the darkness.
