Kim Tae-hyun is a talented surgeon. Desperate for money to pay for his sister’s medical bills, he adopts the code name Yong-pal and offers his medical skills to those in need of medical attention but who cannot do so publicly, dealing with criminals and corrupt plutocrats. Joining a team of corrupt physicians Kim rescues “sleeping beauty” Han Yeo-jin, a chaebol heiress, from a medically induced coma, leading to unintended consequences.Kim Tae-Hyun (Joo Won) is an excellent surgeon, but he is constantly harassed by debt collectors due to his younger sister. His younger sister requires expensive kidney dialysis. To make more money, he goes to see patients privately for a high fee. He doesn’t care whether these patients are criminals as long as they can pay him.