Some cases won't die.
A young boy walks into a police station in France. He claims to be Carl Meagan — a missing child from Sheffield whose name is still whispered as a warning to kids who stay out after dark.

Some children won't be found.
On her way home from the supermarket, nine-year-old Keeley Armitage vanishes without trace. Her family is overcome with shock and DCI Matilda Darke can't help but focus on memories of the Carl Meagan case that almost ruined her career.

Some killers won't be stopped.
As Matilda investigates, she peels back the layers of grief and sadness that surround Keeley's family. Until she is left with an unimaginable choice: betray those closest to her or let a violent killer walk free...