Fang Lijuan (played by Miriam Yeung) has always wanted to be a police officer. After several failures, she was admitted to the police academy. Although she studied hard in the police academy, she was not born to be a police officer. In addition to her unsatisfactory grades, she often made jokes. After graduation, she was assigned to work at the lost and found office, which made her feel very uncomfortable. It happened that the serious crime team needed an undercover agent with a new face in a case of arresting gangsters. Lijuan was accidentally appointed to perform this task. During the operation, she met the gang boss Au Haiwen (played by Daniel Wu). At first, Haiwen felt that Lijuan's life experience was pitiful and planned to help her. Unexpectedly, the two fell in love with each other later. Azu was considerate in every way, which made Fang Lijuan feel torn. She didn't expect that her fake play became real. What decision did Fang Lijuan choose in the end?