In 2002, veteran thief Duan Hu (Zhang Guoqiang)'s thief wife Joanna (Yin Tao) was six months pregnant, but a theft sent the couple to the police station. Xiang Qianjin (Sun Haiying), director of Guanyinqiao Police Station, was in charge of the case. While enforcing the law impartially, he and his apprentice Zhou Shushu took great pains to ensure the safety of Anna and her baby in her belly. The child was born safely, and Qianjin named him Duan Yi, hoping that the child would benefit the people in the future. The thieves were imprisoned, but Duan Yi became an existence that Xiang's family could not give up. Time passed, Duan Yi (Cui Can) entered elementary school, and Joanna and Duan Hu were released from prison one after another. They not only had to think about how to get out of the reformed life, but also how to get along with their own flesh and blood. Although wearing a police uniform, the law does not punish the heart. Xiang Qianjin went back and forth and worked hard to plan for this special family, just for them to have a happy and regretless life...