Dance of the Dead - Ravenloft The Covenant

Trapped on island and surrounded by undead creatures, a dancer must call upon unlikely allies in order to save her soul
 
Larissa Snowmane is a dancer aboard a magical riverboat. For years, the craft has traveled in Ravenloft, unopposed by the sinister beings that rule over the Dark Domains.
 
When the boat arrives at the zombie-plagued island of Souragne, however, the crew finds itself dancing to chilling music indeed. After discovering the captain’s sinister secret, Larissa must rely upon the creatures of the swamp—and her mastery of the magical Dance of the Dead—to save her own soul.