In 1946, a young female attorney from New York City attempts the impossible: attaining justice for a black man in the Deep South.
Regina Robichard works for Thurgood Marshall, who receives an unusual letter asking the NAACP to investigate the murder of a returning black war hero. It is signed by M. P. Calhoun, the most reclusive author in the country.
As a child, Regina was captivated by Calhoun's The Secret of Magic, a novel in which white and black children played together in a magical forest.
Despite his better judgment, Thurgood gives Regina permission to investigate the case. But once down in Mississippi, Regina finds that nothing in the South is as it seems.