"Clayton Stumper might be in his twenties, but he dresses like your grandpa and fusses like your aunt. Abandoned at birth on the steps of the Fellowship of Puzzlemakers, he was raised by a group of eccentric enigmatologists and now finds himself among the last survivors of a fading institution. When the esteemed crossword compiler and main maternal presence in Clayton's life, Pippa Allsbrook, passes away, she bestows her final puzzle on him: a promise...

"Paris, 1885: Aubry Tourvel, a spoiled and stubborn nine-year-old girl, comes across a wooden puzzle ball on her walk home from school. She tosses it over the fence, only to find it in her backpack that evening. Days later, at the family dinner table, she starts to bleed to death. When medical treatment only makes her worse, she flees to the outskirts of the city, where she realizes that it is this very act of movement that keeps her alive. So begins...