France, 1915 Lieutenant Tom Donald envies everything about fellow officer Frank Foden—his confidence, his easy manner with the men in the trenches, the affectionate letters from his wife. Frank shares these letters happily, drawing Tom into a vicarious friendship with a woman he's never met. Although the bonds of friendship forged under fire are strong, Tom can't be so open with Frank—he's attracted to men and could never confess that to anyone. When Frank is killed in no-man's-land, he leaves behind a mysterious request for Tom: to deliver a sealed letter to a man named Palmer. Tom undertakes the commission while on leave—and discovers that almost everything he thought he knew about Frank is a lie…