Chinese Feng Shui master, Carson (Chapman To) was a real ladies' man, he had never been in a stable relationship. Carson was a "Natural Born Player", taking names and breaking hearts. Fate had it that he would meet his match, the hot veterinarian, Chi-Ling (Chrissie Chau). It was love at first sight, but neither could stand the other's fickle nature lest the affair might have ended as soon as it began. So Chi-Ling invite Carson to move in with her and make him promise to have no sexual contact with any girls for 100 days.