During an interview, Shen Yan was humiliated by boss Lu Shen, who blurted out "Are you sick?" This triggered the "Complaint Transformation Contract System" - each complaint automatically generates legally binding contract terms. She was forced to become Lu Chen's "psychiatric caregiver" and signed weird contracts such as acting sick every day, wearing an ugly tie, and getting off work early to accompany him to dinner. As there were more and more contracts, she discovered that Lu Chen secretly recorded every one of them, and his notebook was filled with ten years of secret love. It turns out that he has been obsessed with her ever since they met her when delivering express delivery, and all the difficulties he faced were just to get closer to her. The system was upgraded to a love contract. The two went from cheating each other to sincerely promising each other, and finally signed a lifelong companionship agreement and entered the marriage hall.