Alex Devereux, former cavalry Major and hardened mercenary takes on a mission to raise a private army and attack a diamond mine in Africa – and in doing so, comes face to face with an ancient prophecy with earth-shattering implications. 1501 - A medieval Knight encounters an object of awesome power - The Nubian Deathstone. Filled with terrifying visions of what the future might bring, he embarks on a quest to discover its secret. 1941 - Himmler orders an elite SS Officer on an expedition to resolve the centuries-old enigma, but his discovery will have dire consequences. Working for a diamond cartel and operating outside of international law, Alex comes face-to-face with the Dark Heart Prophecy. Past and present collide - but can Alex redeem himself and prevent the prophecy from coming true?