In Angel Eyes, episode 3, Park Dong Joo(played by Lee Sang Yoon) performed a successful first surgery. Dong Joo, who was a great doctor in America, applied for Seyoung Hospital and got accepted. On the first day, he saw an urgent patient being sent to the emergency room, and a kid that was worried. Dong Joo cheered the kid up and eased his mind. While the doctors were in a mess at the operation room, Dong Joo appeared to perform a surgery. Everyone was hopeless about the patient when Dong Joo managed to save her. He ended the surgery successfully and was happy to keep the promise with the patient’s kid.