Three men, Gao Han, Wang Dongyang, and Yu Bo, are unexpectedly tasked with raising a toddler, Dudu, after the child’s aunt, Guan Shanshan, drops him off. Gao Han, dealing with a custody battle over his daughter, learns that Dudu is the son of his late ex-girlfriend. Amidst the challenges of parenthood and uncovering Dudu’s paternity, the men face complications from Gao Han’s ex-wife and the growing romantic tension between Gao Han and Shanshan, while Yu Bo also develops feelings for her.