Middle-aged couple Shen Mo and Tian Yi, facing their third seven-year itch, see their marriage erupt in a bitter clash of accumulated frustration, culminating in a 30-day cooling-off period that seems destined to conclude their relationship.

Because of a meteor shower, 43-year-old Huang Yuqi (Jia Bing) and 18-year-old himself (Wang Hao) exchanged souls, and the man and the sophomore boy accidentally fell into a burst of dual-time laughter.