Tong Li is a key member of the compliance department at a top law firm. Decisive and efficient, she enters a contract marriage with Pei Yi, whose family business is tied to hers and who works in criminal investigation forensics. At first, they maintain only the appearance of being husband and wife. But after they encounter several unsolved cases involving workplace interests, they go from testing each other to investigating side by side, growing ever more in sync. In the end, they fall in love after marrying and become a perfect crime-solving couple.
