Bluebell Ford is a former tarot reader who helped people—but one day she made a mistake reading the Tarot cards and accidentally killed someone. Now she tries to start a new life and comes to the “Bog of Hope” boarding house to find herself. However, a week-long retreat turns into a nightmare when a flood cuts them off from the outside world, and one of the residents disappears, leaving behind his phone. Blue suspects that someone among them is hiding a dangerous secret, and she wonders whether she’ll be able to return home alive.