To honor her promise to her adoptive mother, Xiao Qu takes care of her disabled son, Lao Tan, and begins an amusing yet heartwarming shared living arrangement with her boyfriend, Xiao Li. At first, Xiao Li sees Lao Tan as a burden, making things difficult for him at every turn and plotting to get rid of him. However, through a series of unexpected incidents and their time together, he gradually becomes touched by Lao Tan's kindness and Xiao Qu's unwavering commitment. Eventually, he puts aside his selfish interests, and the three become a true family, demonstrating the power of family bonds and kindness.