In order to treat his mother's illness, college student Xia Mu reluctantly signed a one-year "contractual love" agreement with Ling Chen, the president of the "Ling Group", and pretended to be Ling Chen's girlfriend to deal with the family's forced marriage. Ling Chen has a cold personality. At first he just used Xia Mu, but he discovered her kindness and optimism as they got along with her. Xia Mu works hard to balance her studies, taking care of her mother and "playing girlfriend" life, but occasionally gets hurt by Ling Chen's indifference. As the contact increased, Ling Chen gradually became interested and began to take the initiative to care about Xia Mu, and Xia Mu also developed a good impression of Ling Chen. When the contract expired, the two faced family pressure and the test of sincerity, and finally broke the contract and gained true love.