Fiona Seymour's cruel father has pledged her to a man she despises. She plots an escape, but at the bank, finds her small inheritance has been stolen. Upset, she hurries away, trips, falls, and is rescued by a stranger. Philip Laughton, recovering from a near-fatal shipwreck, needs rest and quiet, but his superior insists on a last secret assignment, to discover who among the ton is supplying funds to the French. But a lovely woman falls at his feet, and he takes her up in his hackney. Philip shields a thankful Fiona from her pushy fiancé, while covertly searching for traitors, and the two worlds collide. How can Fiona trust this beguiling sailor when she discovers his lies? How can Philip bear to reveal Fiona's connection to the traitors?