Meanwhile, Faceless, king of Gum Tribe, plans to assassinate the Emperor and overtake China. The Gum Tribe creates a diversion by inviting all the doctors of China to a medical exposition in which Flying Fairy is to be dissected. Ling Ling Fat and the Emperor separately depart for the event. While Ling Ling Fat and his wife feast at a string of restaurants, Gum assassins kill the Emperor's three remaining bodyguards. The assassins put the unconscious Emperor in an alien costume and present him as Flying Fairy for dissection. Just as Ling Ling Fat and the other doctors discover the Emperor's identity, Gum assassins begin to slaughter everyone in attendance. Ling Ling Fat uses his wits and inventions to defeat the assassins.
The Emperor honors Ling Ling Fat for his success and gives him an enormous pearl as a reward. For his next assignment, the Emperor charges Ling Ling Fat with investigating a prospective concubine, the beautiful prostitute Gum Tso. Ling Ling Fat meets with Gum Tso without his wife's knowledge and has difficulty restraining himself from her seductive advances. He gives her the enormous pearl and lies about it to his wife. Later, Gum Tso surprises Ling Ling Fat at his home, forcing a violent confrontation between Ling Ling Fat and his wife's family. Ling Ling Fat forsakes his tearful wife and leaves with Gum Tso.
When Ling Ling Fat brings Gum Tso to the palace, he and the Emperor throw Gum Tso in chains and reveal that she is actually Faceless in disguise. Ling Ling Fat had deciphered Gum Tso's true identity during their meeting and enlisted his entire family in a ruse to fool Faceless. The Emperor begins handing out acting awards to Ling Ling Fat's various family members, but Faceless manages to break free. Once again, Ling Ling Fat uses his inventions and wits to combat Faceless, but Faceless fights back with powerful martial arts techniques. On the verge of defeat, Ling Ling Fat uses the Flying Fairy technique he has finally learned from the manual he gained at the beginning of the film, destroying Faceless.
It grossed HK $36,051,899 in Hong Kong.