Top-ranked market research manager, Man Tin-Tzi, is an expert at price comparison. Tin-Tzi who relishes his yuppie lifestyle has been longing for early retirement. But the sudden return of his eight-year-old son seems to have completely shattered his dreams. Tin-Tzi has no experience in taking care of children and is totally clueless about how to look after his son. Luckily his ally-cum-rival Amy Kam is there to help and look out for him in every way. Meanwhile, Tin-Tzi is also trying to patch up his relationship with his godfather Ko Chi-Tim, who has his own family issues.