When a telecom executive develops face blindness, he mistakes his secretary for a wealthy heiress -- which she allows to get out of hand.

Father, son and even grandson, are all mesmerized by this 29-year-old sexy mom. Yong-tae is a dying cancer patient whose wife passed away. Seong-min is a nuisance of a son who is of no use. Yeong-chan is Yong-tae’s grandson who is addicted to porn. A sexy mom comes into the lives of these three men one day. Jin-hee brings positive feelings into the house and prescribes her personal methods of treatment for the three men. Who will get it on with mom?