Marshall packs his bags for a witness escort out of state, leaving Mary behind in Albuquerque with FBI agent Mike Faber (Steven Weber), who's in town with a federal witness in need of protection from the Russian mob. Natalie Vickers (Alexandra Lydon) was once a part of a mortgage scam in Los Angeles, but now she's under Mary & Faber's watch. Seemingly too nonchalant about entering Wit Sec, Natalie has apparently attracted her accomplice & boyfriend to Albuquerque where they continue to operate real estate fraud & get caught in the process. The sexual tension between Mary & Faber rises, as the two of them work closely to stop Natalie from indulging in her criminal past. When Mary realises that Natalie is doing it all for love, the boyfriend becomes a target of the FBI. Yet, Faber has another conflict to deal with, his superior officer in charge Ike Dennis. After being promoted, Ike doesn't gel any more with the lower ranks.