and Jodie have their rookies investigate Lat Keung (Spicy Ginger, Ben Wong). To further dig deeper into Yee Fung's operations, Lap Ching was sent in as a low-level gang and pimp to feed CIB information about one of Yee Fung's major figureheads. In between this time, Laughing chooses to work with Michael So (Bosco Wong), a crippled low-level gangster in Yee Fung. Seeing his ambition, Laughing and Michael have a mutual manipulative relationship to help each other benefit in their respective situations. Ultimately, the operation is considered a success as they detain and charge many of Lat Keung's group in illegal prostitution and racketeering. In the process, Michael rises within the ranks of Yee Fung and gains notoriety. The results of the mission do not sit well with Laughing as he knows Michael went behind his back and did many things to help himself rise; unfortunately, even with Laughing's skills, he can not take down Michael. Using his intellect, Michael quickly rises higher and eventually leads his own group within Yee Fung. Using the power of the internet, he creates new inventive ways to sell drugs at a record pace without HKPD interference. Laughing tried to get another rookie go undercover in attempt to stop Michael, but the process leaves his agent brain damaged and reduced to a wheelchair for the rest of his life. In order to stop Yee Fung, Laughing agrees to become an undercover agent for a fourth time. Using his frustration over his rookie's demise as a ploy, Laughing creates a situation where his behavior could no longer be tolerated by the HKPD and have him kicked out and even sent to jail. All of this drama was to establish his washed-up credibility to be considered by Yee Fung. Not long after, Yee Fung's leader, the Dragon Head, Mok Yat-lit (Cheung Kwok-keung), noticed Laughing's talents and recruited him as his new star member. Working alongside Michael, the duo begin to gain territories and investments at record levels that impresses all of Yee Fung. In between undercover work, Laughing and Jodie become romantically involved. Being Laughing's handler, Jodie tries to keep their relationship professional, but Laughing doesn't make it easy for her. In order to dig in deeper for dirt on Mok Yat-lit, Laughing wins the heart of Mok Yat-lit's mistress, Ting Man, to discover his secret cocaine stash. However, to their surprise, Mok Yat-lit escapes capture