On the day the female thief Bai Xiaoyan was released from prison, she was immediately reminded by Inspector Chen that the gang leader Yan Fang had returned to Hong Kong and would definitely use Xiaoyan's skills for evil again. However, Xiaoyan only wanted to turn over a new leaf. Coincidentally, she met the inspector's younger brother Jialiang, who worked as a tutor for the rich Lin family in the city (helping Mingzi with his studies), so he introduced Xiaoyan to work for the Lin family. As expected by the inspector, Yan Fang had already been monitoring Xiaoyan's movements, waiting for the right moment to threaten her to commit a crime. Jialiang and Xiaoyan fell in love, and when the Lin couple went on a trip, Mingzi inadvertently revealed the secret of the family's treasure stash. Consequently, Yan Fang threatened Xiaoyan with Jialiang's life to force her into action. Although Xiaoyan initially refused to yield, Jialiang was more important to her than her own life, so she reluctantly obeyed Yan Fang's orders. After Yan Fang obtained the jewels, he planned to kill Xiaoyan to eliminate her as a witness, and Jialiang almost hanged himself, but was saved just in time by the inspector. In fact, the Lin couple's trip and Mingzi leaking the secret were all orchestrated by the inspector to set a trap for Yan Fang.