When three girls are stranded at the grand Bramble Estate during a snowstorm, they stumble into a murder plot. Someone has poisoned wealthy Emily Vanforte in the middle of a family dinner - which means Devi, Lizzie and Jayne are trapped in the house with a killer and a mystery to solve. With knives under floorboards, vanishing guns and secret passages in the walls, no one is safe and everyone is a suspect. But in a house of liars and corruption, will the girls save themselves... or learn to fit in?