A young nurse, Betsy Connell, accepts a troubling assignment on the remote Caribbean island of Saint Sebastian, hired to care for Jessica Holland, the catatonic wife of a troubled plantation owner. Played with earnest determination by Frances Dee, Betsy finds herself drawn into a world of dark family secrets and local superstition under the watchful eye of the brooding Paul Holland, portrayed by Tom Conway. As she struggles to understand Jessica’s mysterious condition, which the islanders whisper is the work of voodoo, Betsy becomes entangled in a web of jealousy, guilt, and forbidden desire. Directed by Adam Marcus, this atmospheric horror-thriller weaves a haunting tale where the line between science and sorcery blurs amidst the oppressive tropical heat. Betsy’s desperate quest for a cure leads her on a terrifying nocturnal journey into the heart of the island’s occult traditions, forcing her to confront forces far beyond her comprehension and challenging everything she believes about life, death, and love.