Liang Dynasty, the capital city of Jin. This place is rainy, low-lying, and shrouded in damp and cold fog all year round. It is a water transportation hub and a place where filth and evil gather in. The rain in Jindu is nicknamed "oil rain" by the people. It is thick and cold and cannot wash away sins.
Xie Tinglan was ordered to thoroughly investigate the water transportation corruption case, and the clues pointed directly to the Su family. In order to protect her family and her brothers in the building, Su Wan had to deal with Xie Tinglan. During their exploration and game, the two discovered that the family injustice case back then was inextricably linked to the continuous "strange rain" in Jindu.
Su Wan used commercial means to set up the situation, while Xie Tinglan used legal means to break the situation. The emotional line takes the route of "strong game", from using each other to licking each other's wounds on a rainy night.
Purpose: From mutual utilization to mutual trust