Han Yi-Han (So Ji-Sub) was an elite elite surgeon. He graduated at the top of the best medical school in South Korea and he specialized in two departments: general surgery and cardiothoracic surgery. One surgery changed his life. Han Yi-Han believe he did well on that surgery, but the patient died. He then got his medical license revoked.
Four years later, Han Yi-Han works as a lawyer, specializing in medical litigation. He also tries to uncover the truth behind the death of his former patient. For his trials, Han Yi-Han defends victims and tries to punish those that commit medical malpractice and negligence. He works with a public prosecutor, who lost a family member and a lover due to the surgery Han Yi-Han performed.
