Criminal investigation captain Zhou Lin believes in final justice and acts vigorously and resolutely. However, due to a serial arson case, he crosses paths with Shen Nian, an elite lawyer who believes in procedural justice.
One is a violent and blunt "brutal policeman", and the other is a cool and restrained "venomous lawyer".
When "resultative justice" collides with "procedural justice", when "irritable defense of shortcomings" meets "cold and vicious tongue", the two people were forced to form a "temporary alliance" from being bitter enemies who disliked each other.
As the investigation deepens, what is behind the arson case is not only the shadow of the old case ten years ago, but also the sinful web carefully woven by Master Shen Nian.
Amid the torn apart of ideas and the game of life and death, can this pair of happy enemies overcome the gap in stance and join hands to pierce the darkness of winter?