You need to know

The holidays are here. The extended family has gathered. The cars are packed and the convoy sets off. The cottage is a few hours' drive - but not everyone will live to see it. For Jill, her three sons, their wives and children, a terrifying road crash will tear apart their family. The crash will be an accident but the shattering that follows has been long coming. Because at the heart of this family lies a secret - concealed, wrestled with, festering, and harmful - and nothing now can stop it coming out. But will any of them survive it?