Upon returning to New York City after a whirlwind British excursion, Stone Barrington is notified of a delicate situation within the country's administration. A close friend requires his expertise and subtlety to eradicate a destructive presence in a classified agency--only it soon becomes clear that this renegade was sent by a rival Stone has encountered before.

From the City of Light to the rocky Maine coastline, Stone will need to summon all his wit and daring to halt the audacious plots threatening to reveal confidential intel, and catch the evasive traitor at last. This enemy may be equipped with unlimited resources and devious schemes, but if Stone remains vigilant, justice may finally prevail. . . .