A group of conspiracy theorists are secretly watching a Top Secret military base in the desolate Welsh mountains. They are looking for experimental and highly classified test aircraft to report about in a magazine, when they suddenly discover a Top Secret and highly lethal creature (secretly discovered in the 1920s) which the military and Government are testing whose fur has the ability to turn invisible in moon light. The film follows their plight as they are hunted both by the creature (which the Army has nick named "The Silverhide") and the military who will stop at nothing to keep their classified specimen a secret.