Based on characters from 19th-century Chinese novel The Seven Heroes and Five Gallants. Zhan Zhao, the South Hero, was granted the title Lord Cat by Emperor Renzong. Wu Yi, known as Five Rats of the Sky Island was disappointed to hear this. Bai Yutang, the fifth brocade mouse, was extremely furious. He swore to compete with Zhan Zhao. The Fire Immortal of the East Capital is offering ceremony to show the country's peace and prosperity. The Fire Immortal Statue is granted to pray for the world. His Majesty ordered Zhan Zhao to protect it. When Bai Yutang heard about this, he attempted to steal the Fire Immortal Statue for the dignity of the Five Rats. The brothers came one after another, but they accidentally got involved into a mysterious revenge case.

In 1950s Hong Kong, British merchants and Chinese triads have joined forces to expand their territory, forcibly demolishing factories without regard for public welfare. This move draws fierce opposition from Ip Man, standing up for the workers, he faces pressure from all sides. Framed for murder, he is sent to prison. Within the prison walls, the triads set multiple deadly traps. Can Ip Man overcome these trials, escape the danger, and clear his name?