Chen Haonan (Ekin Cheng), Shan Ji (Jordan Chan), Chao Pi and others have been friends since their youth. They have no interest in studying and yearn for the life of the underworld. Finally, a gangster named B took him in as an apprentice and began to venture into the underworld. Haonan showed his skills in a gang vendetta and killed the underworld boss Ba Bi, thus forging a deep hatred with another leader Liang Kun (Francis Ng). Liang Kun tried to harm Haonan, causing the tragic death of Haonan's brother Chao Pi, and Haonan took drugs by mistake and had sex with Shan Ji's girlfriend, and resentment began to accumulate between the brothers. Haonan was discouraged and planned to stop, but unexpectedly, the boss B's family was killed and his own shop was burned down. Liang Kun's step-by-step pressure made Haonan unbearable.