The novel is set during World War II. It revolves around the characters Marie-Laure LeBlanc, a blind French girl who takes refuge in her great-uncle's house in Saint-Malo after Paris is invaded by Nazi Germany, and Werner Pfennig, a bright German boy who is accepted into a military school because of his skills in radio technology. The book alternates between paralleling chapters depicting Marie-Laure and Werner, framed with a nonlinear structure. The novel has a lyrical writing style, with critics noting extensive sensory details. The story has ethical themes, portraying the destructive nature of war and Doerr's fascination with science and nature.
