Marie-Laure lives with her father in Paris near the Museum of Natural History, where he works as the master of its thousands of locks. When she is six, Marie-Laure goes blind and her father builds a perfect miniature of their neighborhood so she can memorize it by touch and navigate her way home. When Marie-Laure is twelve, the Nazis occupy Paris, and father and daughter flee to the walled citadel of Saint-Malo, where Marie-Laure’s reclusive great-uncle lives in a tall house by the sea. With them they carry what might be the museum’s most valuable and dangerous jewel.