Yong-Tae (Myung Gye-Nam) runs a pharmacy and suffers from terminal cancer. His wife passed away a long time ago. He lives with his son Sung-Min (Hong Seo-Jun) and his grandson Young-Chan.

29-year-old sexy mother Jin-Hee (Chae Min-Seo) appears in front of them.  

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?