In the Old American West, Whitefeather is a half-Indian/half-French shaman with tormenting visions of an apocalyptic future where mankind has doomed itself after turning away from the law. He then has a further vision of mankind's salvation. He sees Arthur, the man who is destined to bring law to the world and the weapon that will bring about this change. A mystically-emblazoned gun, that can only be fired by one man, that will never miss and when aimed will bring down the heavens, firing thunder itself from its barrel. He sets out to find the legendary Caliber. An epic Western adventure like no other!

A small team of treasure hunters struggles to excavate a dangerous and legendary treasure pit before a massive storm hits Sable Island, the 'Graveyard of the North Atlantic'. Equipped with all the latest technology, the scientists believe they are prepared against all of nature's fury, but nothing can prepare them for what they are about to unleash from The Vault.