Was Leonardo Da Vinci, one of history's great philosophers, artists and engineers, a secret prophet? And did he envision world destruction of such biblical proportions that it haunted him until the end of his days? Clues hidden in Da Vinci's paintings, his re-discovered prophetic "riddles" and the events of his life now suggest that he, too, was influenced by the Nostradamus Effect. 400 years ago, Da Vinci may have intercepted signs and warnings as early as his boyhood. He witnessed a devastating flood that ravaged his city and that seems to have haunted him with depictions of a watery apocalypse similar to the biblical great flood. Are the clues Da Vinci hid within his writings, his sketches and his masterpieces, all a secret code pointing to a great deluge that will wipe out all mankind?