Sometimes it takes a wolf to save the sheep, a monster to fight monsters, and a killer to become the hero the world needs. When the Great Integration fuses Earth with a hostile, magical realm, civilization collapses as monsters flood the world. Damon Cross, an easy-going neurosurgeon with a dark, hidden side, is thrust into chaos during a camping reunion gone wrong. And when others falter, he bares his fangs. As a mysterious System grants game-like powers, Damon’s cold precision and deadly instincts may soon make him the greatest danger around. In a world of monsters, the deadliest one may one day wear a human face—Damon's face. But it’s not just monsters he hunts. Criminals, beasts, or worse—all will face his bloody justice. Because in this new world, Damon is judge, jury, and Executioner. And the only law that matters is his.