The heroine is a rich girl, and her family wants to avoid marriage with the hero's family in the business world, but the heroine disagrees. The hero and the heroine had met once many years ago. The heroine didn't remember the hero, but the hero always regarded her as his first love. The hero didn't want to miss this marriage opportunity, so he customized a contract with the heroine as the first party. The heroine couldn't resist the coercion and inducement of her family, so she had to agree to come and marry the hero. Later, the heroine accidentally joined the hero's company as an employee. The hero always responded to her requests. The heroine gradually developed a good impression of the hero, who was her immediate boss. Just when the hero was about to confess that he was her marriage partner, the two were exposed to a scandal. The heroine got the title of mistress, and the relationship between the two came to a deadlock. The heroine decisively left the company to start her own business. The hero secretly protected her. When the heroine's career was booming, she considered whether to cancel the engagement. The hero was anxious and at the critical moment, the female supporting role appeared pretending to be his wife and humiliated the heroine. The hero appeared to clarify, and his identity was revealed. The hero and the heroine canceled the business marriage and started a serious relationship.