An accident when he was nineteen completely changed Xiao Lan's life. His parents were killed, but there was no clue about the murderer. In order to find the murderer, he resolutely chose to become a policeman, just to pursue the truth.
(The author is not very good at summarizing, it is just a criminal investigation story, and then it mainly focuses on solving the case, with some romance in the middle. If there are any problems involving professional knowledge, please point out, yes, that's probably it)
Motto: No matter how long it takes, the truth will eventually come to light