Merry is used to men double-taking when she walks into a room. There aren’t many female geographers in the Naval Intelligence Division, and few mapmakers can match her skill.

So when a family crisis calls her back to Cornwall, a landscape she knows well, and she is expected to work with a team running secret flotillas to northern France, Merry is prepared for the comments she gets from her fellow officers.

But, with a war underway, not everything she faces will be as clear and simple as the maps she draws, and Merry soon finds herself facing a situation that will challenge everything she holds dear when she meets an enigmatic, handsome American officer…