Synopsis：Three years ago, in order to save the financial crisis faced by the family business, Liang Zhiwei reached a contract with Fu Linzhou and obtained the marriage certificate in secret. Three years later, Liang Zhiwei returned to China as a professor of botany at Peking University, and the two reunited. At first, Fu Linzhou asked Liang Zhiwei to move in together on the grounds of contract, and the two parties maintained a transactional relationship in which each seemed to get what they needed. However, Fu Linzhou had already fallen in love with Liang Zhiwei during the day-to-day interactions. He not only silently guarded her, helped her block the rotten romance from the outside world, but also patiently untied her knot in her heart. As the plot progressed, Liang Zhiwei hesitated and flinched because of Fu Linzhou's suspected "scandal White Moonlight", but Fu Linzhou finally confessed his identity - he was the childhood sweetheart Liang Zhiwei had been searching for for many years. After the misunderstanding was eliminated, the two went from testing each other to being honest and loving each other, and their relationship warmed up.