Two murders - thousands of years apart. And the conspiracy that links them. Cain killed Abel: the original murder. But the Bible is silent about one key detail: the weapon Cain used to kill his brother. That weapon is still lost to history. In 1932, a man was killed by three gunshots to his chest. While mourning, his son dreamed of a bulletproof man and created the world's greatest hero: Superman. And like Cain's murder weapon, the gun used in this unsolved murder has never been found. Until now. Father and son are suddenly thrown into a bloodthirsty quest for an ancient weapon, and the answer to a secret that people are dying to find...