Dr. Michael Morbius suffers from an incurable disease that brings him monstrous pain and much suffering. In search of a cure or relief of symptoms, it finds a way out in the blood serum of bats. After a series of experiments, he injects the medicine and realizes that the disease is behind him. After a while, the drug begins to show its side effects. Morbius turns into a bloodthirsty vampire constantly thirsting for human blood.