Myoui Mina is the most top paid surgeon, she is also the best surgeon among 60,000 surgeons. People admire her even little kids, because of her appearance, etc, especially her personality. She ONCE had a boyfriend but their relationship didn't work because of her busy life, they only last about 8 months. Son Chaeyoung lived in NaYoung Hospital since she was high school because of her sick, she is the heir of their clothing business, one of the biggest business. Chaeyoung is known at NaYoung's hospital for she lived their like half of her life, her parents only visit her ONCE or TWICE a month, so she is always at her room, sometimes at the rooftop.

Chaeyoung was a happy person before, she ONCE had a happy family, but when their business went well her parents never had time for her, when one day her doctor told her she's very sick that's the time her life went opposite.