This series takes female police officer Ran Dongdong and members of the task force as the main thread to solve a murder case, and the female protagonist Ran Dongdong's marital life as the secondary thread. The dual thread interweaves, successfully shaping the image of a female police officer who pursues the truth, punishes evil and promotes good. In the process of solving the case, she overcame the three difficulties of the complex and confusing case, the psychological interference of whether her husband betrayed her, and the mild depression caused by work pressure, and ultimately brought the criminal to justice.