After the death of his mother, Isaac and his pregnant wife Emma return to the remote Norwegian island of his birth to deal with an unexpected inheritance. They find themselves caught in a nightmare as an ancient cosmic horror awakens to claim a birth right of its own.After his mother's death, Isaac and his pregnant wife return to his birthplace on a remote Norwegian island to claim on unexpected inheritance. During their visit, the couple discover dark secrets from Isaac's past. Their pleasant trip quickly turns into a nightmare when Isaac and his wife encounter a sinister cult that worships a sea-dwelling deity.