Relates the story of the National Memorial African Bookstore, founded in Harlem by Louis Michaux in 1939, as seen from the perspective of Louis Michaux Jr., who met famous men like Muhammad Ali and Malcolm X while helping there.

A self-proclaimed sock detective inside her parents' New York City laundromat, 10-year-old Magnolia Wu and Iris, a new friend from California, set off across the city to solve the mystery of each missing sock, meeting people and uncovering the unimaginable along the way.