In a snowbound village in the heart of the Alps, a husband and wife find their lives breaking apart in the days and months following the death of their firstborn. On the far side of the world, in their hometown of Sydney, a man on the margins of Australian society commits an act of shocking violence that galvanises international attention. As the husband recognises signs of his own grief in both the survivors and the perpetrator, his fixation on the details of the case feeds into insomnia, trauma, and an obsession with the terms on which we give value to human lives