Little Kai and his girlfriend Lin Yanxi are in love, but the appearance of her sexy twin sister Lin Yanrou throws him into confusion.
He identifies people by tears and moles, but as he spends time, he becomes increasingly suspicious.
An accident unravels memories, revealing that he once had a relationship with Lin Yanrou.
Eventually, the misunderstanding is resolved, and the two stay together in the manor, while Lin Yanxi chooses to step back.