In 2007, 16-year-old girl Qiao Qingyu and her family, tormented by rumors about her sister Qiao Beiyu's death, were forced to relocate from their small county town of Shunyun to the provincial capital of Huanzhou. In order to quickly restore their family's normal life, Qingyu, with the help of her classmate Ming Sheng, began searching for the true cause of her sister's death.

Deputy captain of the anti-narcotics brigade Tang Lang and the female special police captainYue Xiaofeng are two public security police who are working together on the front line of life and death.

In 2007, 16-year-old girl Qiao Qingyu and her family, tormented by rumors about her sister Qiao Beiyu's death, were forced to relocate from their small county town of Shunyun to the provincial capital of Huanzhou. In order to quickly restore their family's normal life, Qingyu, with the help of her classmate Ming Sheng, began searching for the true cause of her sister's death.