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?