The play is still set with two male actors. Situ Yan lost his job because he adhered to the legal principle, but he came to Harbin in desperation, but he still had justice and courage, and fully demonstrated his professionalism and intelligence in various difficult cases.

Luo Shaochuan is a straightforward detective. In the process of partnering with Stuart Yan, the two are also a pair of stooges, with constant jokes. In Harbin, Situ Yan not only met his good brothers, but also met Zhou Mowan, who is free and easy. The love career has a double harvest, and Situ Yan's life is really enviable.

The drama tells a total of eight cases, namely, Murder on the Orient Express, the murder of the richest man's manor, the haunted terror case of a girls' school, the poisoning case of Zhajiang Noodles, the cheating case of a wealthy family, the kidnapping of a Japanese consul, the serial murder case on a snowy night, and the disappearance of a double-faced lover.

Eight cases are wonderful eight times, and there are only 24 episodes in the whole drama. Presumably, the rhythm of the plot must be very fast, which is too attractive for netizens to call.