Depois que um navio de cruzeiro gigante navega sobre o local do desastre do Titanic, eventos sombrios e mortais começam a ocorrer a bordo. Quando o capitão do navio investiga as trágicas ocorrências, torna-se claro que os passageiros do Titanic original voltaram.

A couple who are about to give up on their dream of having children find a doula who promises a magical solution to their infertility problems, but when she moves in for a series of strange, taxing rituals, overseen by a charming - but dangerous - doctor, they find out that the magic is extremely risky and that the baby they're about to have might not be quite human.