FBI operative Buddy infiltrates the Mafia as a double for the slain boss Barton, determined to expose an international arms-running network. Between rival power plays and Susanna's relentless suspicions, he finds himself drawn to Barton's widow, Elise. A birthmark is all that keeps his identity intact—until Director Burke, the syndicate's secret insider, unravels the brothers' hidden truth. With Helena reacting and the family closing in, Buddy must decide how far he'll go before the mask becomes his face.