The heroine is Song Xia, and the hero is Lin Feng. The background is that Lin Feng's father died in the line of duty. Lin Feng was admitted to the police academy to find the truth for his father. The heroine's father and the hero's father were comrades in arms. The heroine's father was killed by the hero's father, and the family was ruined. The heroine searches for the truth. In the end, the two find out the truth together and become husband and wife.
Concept: Justice is not a black and white matter, but a protracted battle through the fog.