Emma Sharpe and Colin Donovan, two of the FBI's most valuable agents, are preparing for their next big assignment - their wedding - when Colin's brother Mike alerts them that one-time friends from his military past are on Sharpe and Donovan home turf on the Maine coast. Now private security contractors, they want to meet with Mike. One of them, an FBI agent named Kavanagh, is supposed to be on leave. What is he investigating - or does he have his own agenda?