S01E01 Between Hope and Despair
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.
Tae Kyung thinks that it is not right to fire Yo Han. Ri Hye gets a strange text from Death Talks. Won Gil meets Yo Han and tells him about the Cherubim. However, Yo Han gets furious about the idea of the Cherubim, and he calls Seok Ki to report Won Gil.
Cha Yo-Han—an arrogant but genius doctor of anesthesiology—and Kang Shi-Young—a smart, warm resident of anesthesiology—work together to help people with mysterious cases of acute or chronic pain.