FBI agent Buddy—identical to dead Mafia patriarch Barton—goes undercover, dodging power grabs, Susanna's probes, and falling for Barton's wife Elise. With twin brother Barton's birthmark as cover, he gathers arms-smuggling evidence. But FBI Director Burke is the Mafia's mole—and reveals Buddy and Barton are twins. Helena twitches. Cliffhanger.