Ji-sang, a pure vampire born to parents infected with the vampire virus VBT-01, volunteers as a surgeon in the war-torn Republic of Kochenia.

Ji-sang joins Taemin Cancer Hospital in an attempt to unravel the mysteries of VBT-01.

The new director, Jae-wook, seems pleased with Ji-sang's reaction to seeing a patient's blood.

Jae-wook establishes the New Drug Development Headquarters and gathers patients for Ward 21A.

Ri-ta examines Ji-sang when he collapses after being injected with a drug by some mysterious men.

Hyun-woo discovers that the injection is the same drug that killed Ji-sang's mother.