During the National Day holiday, wealthy young woman Shen Miaomiao invites her roommate, Qin Yue, to stay at her home. Qin Yue accidentally overhears Shen Miaomiao referring to her pet Border Collie, Lele, as her younger brother. Misunderstanding what she means, Qin Yue sparks a hilarious mix-up. Shen Miaomiao patiently explains the truth and clears up the misunderstanding. After this unexpected little incident, Qin Yue faces her own feelings, and everything settles down peacefully.