Mark works as a nurse in a private clinic run by the charismatic and ambitious Doctor Morter. The arrival of an Eastern European patient carrying a unique form of rabies seems to hold out the hope of finding a cure for cancer and Aids. Morter sets to work in a sealed wing of the hospital. When one of Mark’s favourite patients disappears, he discovers that Morter’s experiments have left ethics and even sanity far behind and replaced them with a horde of blood-thirsty flesh-eating monsters.