Olgami plot
Newlywed Su-jin believes that nothing will stand in the way of happiness between her and her husband Dong-woo. That is, until she meets her mother-in-law. Dong-woo is very devoted to his mother and now that they're all living together, it's not long before Su-jin notices something unnatural about the affection between the two. When confronted, Dong-woo promises his new wife that she will be his number one priority. But because of his job, he is away from home a lot and this gives the mother-in-law enough time to come up with a plan to eliminate her rival...