Storyline:

Choi Deok-Hee (Sul Kyung-Gu) is the best neurosurgeon in the world. In the past, he had a pupil named Jung Se-Ok (Park Eun-Bin). She was a promising and gifted doctor, but Choi Deok-Hee had mixed feelings about her. Then, during an operation, he permanently kicked her out of his operating room.

Even though Jung Se-Ok was once known as a genius doctor, she now works as a shadow doctor in an illegal operating room. Somehow, she meets her ex-teacher Choi Deok-Hee again. He was the one who kicked her to the bottom. These two crazy, but gifted neurosurgeons confront each other and grow through that. There are also people around Jung Se-Ok. Han Hyeon-Ho (Park Byung-Eun) is an anesthesiologist who feels sorry for her and Seo Young-Joo (Yoon Chan-Young) always stays by her.