A renowned English anthropologist uncovers a frozen prehistoric creature in Manchuria, which he believes holds the secret to the Missing Link. He transports the specimen to Europe on a trans-Siberian express, only to find the creature revives and begins a gruesome killing spree among the passengers.

Horror Express
Two anthropologists' academic rivalry turns deadly on the Trans-Siberian Express as a prehistoric ape, infected with a lethal parasite, escapes its cargo and threatens the train's passengers.