In 1930s England, a group of pretentious rich and famous gather together for a weekend of relaxation at a hunting resort. But when a murder occurs, each one of these interesting characters becomes a suspect.
A year after Sheila is killed in a hit-and-run, her multimillionaire husband invites a group of friends to spend a week on his yacht playing a scavenger hunt-style mystery game—but the game turns out to be all too real and all too deadly.
Bourne is brought out of hiding once again by reporter Simon Ross who is trying to unveil Operation Blackbriar, an upgrade to Project Treadstone, in a series of newspaper columns. Information from the reporter stirs a new set of memories, and Bourne must finally uncover his dark past while dodging The Company's best efforts to eradicate him.
When intelligence agent Kathryn Woodhouse is suspected of betraying the nation, her husband – also a legendary agent – faces the ultimate test of whether to be loyal to his marriage, or his country.