A mixed martial arts fighter Joo Hyung Woo gets injured during his match. Yo Han tells Hyung Woo that he needs to be treated right away if he doesn't want to lose his sight. Many doctors in Seoul Hanse Medical Center oppose Yo Han's reinstatement, but he comes back to the hospital thanks to Tae Kyung.

Hyung Woo's wife wants to respect Hyung Woo's will, but his father wants to save him. Yo Han keeps trying to find out the name of Hyung Woo's disease. Meanwhile, Hyung Woo's condition gets worse again, and Yo Han wants to treat him once again.