Marie-Grace Gardner, a doctor's daughter who has just returned to her native New Orleans in 1853, makes friends with Cécile Rey, whose prosperous family are free people of color, and is persuaded to change places with her at separate Mardi Gras balls.

Cécile Rey, whose prosperous family are free people of color, makes friends with Marie-Grace Gardner, a doctor's daughter who has just returned to her native New Orleans in 1853, and persuades her to change places at their separate Mardi Gras balls.

Now that the yellow fever epidemic is over, the people of New Orleans raise money to care for the orphans, and Cécile seeks to discover something special she can to do help.