Returning to Knights Bridge, Massachusetts to solve a 300-year-old mystery and salvage her good name, treasure hunter Samantha Bennet goes up against bad-boy firefighter Justin Sloan--the very same man who alerted her late mentor of her questionable past and got her fired.

Discovering that two friends from his military past are conducting a secret investigation on the Maine coast, Colin Donovan's brother, Mike, investigates a freelance intelligence analyst before discovering a link to Emma Sharpe.

As a deputy U.S. marshal, Juliet Longstreet has locked up quite a few violent ciminals. When one of Juliet's enemies is released, he's on a mission to kill-- and she's first on his list. She must team up with hunky Special Forces agent Ethan Brooker to find the criminal. That is, if she can trust Ethan.

When someone sets off a bomb in Boston, Lizzie discovers that billionaire Norman Estabrook as well as the FBI director's daughter have disappeared. Together with intelligence officer Will Davenport, Lizzie sets out to track them down.

An FBI legend, a mysterious antiquities specialist, and a brazen art thief draw top FBI agents Emma Sharpe and Colin Donovan into a complex web of blackmail, greed, and murder.

While vacationing in a tiny town on the south Irish coast, FBI agents Emma Sharpe and Colin Donovan encounter a woman from Colin's past whose presence arouses their suspicion and sets in motion a dark chain of events.