In 1917, John Waveney, recently released from the hospital and headed back to the trenches in France, goes to visit the part of England his ancestors came from. He encounters a girl of 15, and when she learns he is all alone in the world, she tells him she would be sorry if anything happened to him.

Somehow John survives the war, and some years later he learns he has inherited the ancestral home. Wondering about the girl he met long ago, he learns she is a cousin but is mysteriously missing: no one will mention her name and he is warned not to discuss her. Even her own twin sister refuses to do anything but sob when Anne Belinda is discussed. John feels a strange sense of loyalty to the one person who sent him off to war with a kind word, and he becomes determined to find out what kind of trouble she is in and find a way to assist her. Of course, once he meets her he falls in love with her courage and the humor she is nearly always able to maintain, despite great trials. Not the least part of Anne’s appeal is her determination not to be rescued.