One of the hot issues among Korean people is plastic surgery. No matter how old they are, people are willing to change their appearance and a large number of artificial beauties are born by doctors here and there. Now we have coined neologisms, 'medical twins' meaning people who get plastic surgery look similar like twins and 'plastic surgery monster' meaning a surgiholic. Ruby Ring is about two sisters living an exchanged life of each other by an accident and this drama would like to tell viewers that how fatal the lies from endless desires can be on one's life by two sisters' story.