In 1937, American circuses are trying to recoup the losses they incurred during the Great Depression while competing with newer forms of entertainment like movie theaters. Kate Montgomery travels to the small town of Brixton Hill to scout a new act for her father's struggling circus. Lewis Oswald, a trainer and friend of Kate's family, introduces her to the Shadow Dancers, three young girls who can make their shadows dance independently of their bodies. While the act would revive her family's circus, Kate is horrified by the young women's dismal training and living conditions. She wants to help them escape their dreadful situation, but when the Shadow Dancers take matters into their own hands, she'll have to save herself.