There used to be an empty chair at the back of Mrs. Khan's classroom, but on the third Tuesday of the school year a new kid fills it: nine-year-old Ahmet, a Syrian refugee. The whole class is curious about this new boy--he doesn't seem to smile, and he doesn't talk much. But after learning that Ahmet fled a Very Real War" and was separated from his family along the way, a determined group of his classmates band together to concoct the Greatest Idea in the World--a magnificent plan to reunite Ahmet with his loved ones.