With the help of her white friend Marie-Grace, Cecile, a well-to-do black girl in 1853 New Orleans, plans a secret adventure at a Mardi Gras costume ball.
C?cile Rey, spending the summer volunteering with her friend Marie-Grace Gardner at a nearby orphanage, forms a special bond with a young girl named Perrine and decides to try and raise money for the children by helping in a huge benefit.
After his parents help him escape from slavery on a cotton plantation, fourteen-year-old Midnight finds freedom in Mexico and becomes a cowboy on a cattle drive to Kansas.
C?cile Rey looks forward to having a one-of-a-kind costume at Mardi Gras and her brother's return from France, while forming a friendship and having a daring adventure with Marie-Grace Gardner.