The old cigarette lighter on SUN’s chest pocket has saved his life. The teams of LUNG and YUE carry out investigation together in order to capture the bandit SONG FU. They finally deduce that the bandit is hiding in Tsim Sha Tsui. SUN recovers and leaves the hospital. Somebody sends him a doll and the doll is exactly the same as the one he gave to his daughter long time ago. He therefore suspects that his daughter has returned to Hong Kong. SUN suddenly has an impulse and he rushes to Tsim Sha Tsui to look for his daughter. LUNG and YUE pretend to be lover to carry out investigation. However, their real identity is exposed and a gunfight is started in Tsim Sha Tsui… LUNG invites YING for dinner. He brings all his colleagues to the restaurant and announces to everybody that YING is his girlfriend. SUN returns home and finds that a girl who looks like his daughter is talking to YUK…