After getting released from jail, Law Lik-ah wants to start anew, so he partners up with his comrade Kris Wong Sze-fu to fight against injustice. Lik-ah and Kris soon become the heroes of Sham Shui Po but their personalities conflict and they constantly disagree with each other. In the meantime, they have offended the wealthy property developer by handling a building collapse case and Lik-ah's life is in danger. Will they be able to find justice for the disadvantaged citizens in Sham Shui Po?