Allenbert, a sickly nobleman, awakens to discover he harbors the soul of Karzan—the ruthless mad dog of the underworld. Yet this world feels twisted, dangerous in ways he never anticipated. "Nobles thrive on secrets and shadows," his brother whispers, weaving serpentine plots that tighten around him relentlessly. "Your recent actions have drawn unwanted attention," the family patriarch's omnipresent network warns, his gaze inescapable. "Will I ever see Mother again?" Access to his secluded mother, broken by mental anguish, remains forbidden. Karzan's era ended in failure, but Allenbert's path unfolds with fresh purpose. Two lives demand two vengeances—and this time, mercy has no place. Every debt will be collected with compound interest, executed with absolute precision.