Ella Townsend, a young African-American anthropologist whose roots are Caribbean, researches Louisiana folk life and discovers not only the world of voodoo and carnival but also the mystical connection of the living and the dead. With her tape recorder she explores the rich heritage of Creole Louisiana, but Mammy, Ella's primary informant, dies during the project. From beyond the grave she continues to transmit messages.

Although the academically minded Ella is dubious about the authenticity of the medium, gradually, as she confronts her prejudices, the tapes convey enriching mysteries about the past lives of Mammy and her friend Lowly. From this supernatural experience Ella learns much about herself and her background.