A martial arts coach jokingly says she could tame the city's biggest playboy. His billionaire father hears it, hires her on the spot — and suddenly she's his son's fake wife. She puts him in his place, takes over his money, and quickly realizes he's not as useless as he seems. Between dodging scheming rivals and showing off hidden talents in everything from racing to wine-tasting, the two go from hostile to inseparable.