Xia Dong, a business investigator at the business consulting company Ouxun Group, was falsely accused of plagiarizing AI technology while studying abroad ten years ago. The betrayal of his best friend and the death of his father pushed him to the bottom of his life. Qin Ke took the opportunity to help him join Ouxun Shanghai Department. When Jian Yan, from Ouxun Tokyo Department, was 15 years old, his father was accused of stealing trade secrets and forced to lose his job. Jian Yan aspired to become a senior business investigator and strangle fraud in the cradle. Because of his meritorious service in exposing corruption in the Tokyo Department, Jian Yan was transferred to Shanghai. In the subsequent day and night together, the two opened their hearts and gradually fell in love. Soon, when Xia Dong and Jian Yan were conducting a corporate background investigation, they had to face life and death disasters again and again because they helped their old classmate Lin Junwen who was deeply involved in family disputes. In the face of danger, Xia Dong and Jian Yan worked together and supported each other, and finally successfully completed this corporate background investigation. Not only did they perfectly protect the legitimate interests of the relevant companies, but they also made the black sheep hidden in the company receive the due punishment. After going through many ups and downs, Xia Dong and Jian Yan not only reaped beautiful love, but also became more determined to eliminate commercial fraud, safeguard corporate integrity, and adhere to the correct values of contemporary business society.