A-Long (Chen Kuan-tai) is an undercover police officer, but because his identity was exposed, he was beaten and injured, and suffered severe injuries that led to his loss of memory. However, more than 50 million yuan of public funds in his hands disappeared. At this time, he was being hunted by the gang, and the police suspected that he had embezzled public funds and was wanted, so he was trapped on both sides. A-Sing (Stephen Chow) is a thief who was screwed by A-Long during a theft, and the two met. A-Long, who lost his memory, mistakenly thought that A-Sing was his relative, and he had to follow A-Sing all day long. A-Sing hopes to do his best to help A-Long restore his memory and remind him of the whereabouts of the huge sum of 50 million yuan. Finally, they met the inspector (Tsang Kong), and when the inspector took them to a warehouse, A-Long suddenly remembered everything...