Ten-year-old Helen and her summer guardian, Flora, are isolated together in Helen's decaying family house while her father is doing secret war work in Oak Ridge during the final months of World War II. At three, Helen lost her mother, and the beloved grandmother who raised her has just died. A fiercely imaginative child, Helen is desperate to keep her house intact with all its ghosts and stories. Flora, her late mother's twenty-two-year-old first cousin, who cries at the drop of a hat, is ardently determined to do her best for Helen. Their relationship and its fallout, played against a backdrop of a lost America, will haunt Helen for the rest of her life. This darkly beautiful novel about a child and a caretaker in isolation evokes shades of The Turn of the Screw and also harks back to Godwin's memorable novel of growing up The Finishing School. With a house on top of a mountain and a child who may be a bomb that will one day go off, Flora tells a story of love, regret, and the things we can't undo.