Dark Fell Barn is a “perfectly isolated” retreat, or so says its website when Jayne books a reservation for her friends. A quiet place, far removed from the rest of the world, is exactly what they need. The women arrive for a girls’ night ahead of their husbands. Ex-Army Jayne is hardened and serious but also damaged. Ruth is a driven doctor and new mother who is battling demons of her own. Young Emily, just wed and insecure, is the newest addition to this tight-knit band. Missing this year is Edie, who was the glue holding them together, until her husband died suddenly. But what they hoped would be a relaxing break soon turns to horror. Upon arrival at Dark Fell Barn, the women find a devastating note claiming one of their husbands will be murdered.