Doctor John

Second year resident Kang Si Young working as a part-time doctor in prison. Meanwhile, former doctor Cha Yo Han, now a prisoner helps prisoners who are in need of medical treatments.

Inmate 5353 is known as a hypochondriac, but former doctor Cha Yo-Han does not believe so. Shi Young's mother and uncle try to talk her out of leaving for Madagascar. She wants to stay, but will she?

Inmate 5353's symptoms over the last few weeks, when stacked together form a diagnosis of a disease that only 0.00001% of the population has. Since the disease is hereditary, the doctors try to find a family member.