Ruth is less-than-thrilled to be spending the weekend at the family farm visiting the ancient GG, her coolly distant step-grandmother. With no internet or phone coverage, she occupies herself by re-reading old Agatha Christie novels, eavesdropping on the adults and definitely not daydreaming about her sort-of-cousin Dylan. But when GG dies under suspicious circumstances, Ruth's dull weekend turns into an enforced-family-holiday-slash-possible-murder-investigation and she's not about to let the police get in the way of her chance to solve a real-life murder mystery. With Dylan as the Watson to her Holmes, Ruth soon discovers that plenty of people had reasons to be rid of GG, and her list of suspects grows to comprise everyone in the house, including, in the interests of fairness, herself. The thing about family holidays is that you've got to be prepared for fights.