Alec de Payns, espionage operative of the Y Division of the DGSE, France’s famed foreign intelligence service, is tasked with tracking down an agent of influence sending highly classified material against the Kremlin to embassies all over Europe. The clues lead to a secret meeting of businessmen, terrorists, and mercenaries on a luxury yacht in the Mediterranean, which de Payns must infiltrate. What he discovers sets off a Europe-wide manhunt in a desperate scramble to prevent an international catastrophe.