Triad leader Roller and life-sentence inmate Scar maintain the balance of power as the bosses of the prison they're incarcerated at. Life at the prison gets disrupted by the arrival of new inmate Mak, who has run-ins with both Scar and Roller. With things going so badly for him in prison, Mak has no choice but to join in the breakout plot being hatched by Chan. However, Roller and Scar also end up being part of the plan!

Ho Chun, a young entrepreneur, is sent to jail. By implementing his philosophy in the business world that money can solve any problems, Ho Chun offers Big Roller, Kin-Tin, Scar and Ho-Ching a considerable amount of money for assisting him to breakout from jail.

Former warden Tang is imprisoned for accepting bribes, while Jun who failed to escape from prison returns to prison to continue serving his sentence. Jun sees that Tang is familiar with the prison and lures him into cooperating in the breakout plan. The two hit it off, and even tried to create trouble and blame it on Big Roller. Jun soon discovers that Tang has other tricks, forcing him to team up again with Big Roller, Mak and new warden Ma to crack Tang`s conspiracy.