Theo Miller knows the value of human life - to the very last penny. Working in the Criminal Audit Office, he assesses each crime that crosses his desk and makes sure the correct debt to society is paid in full. But when his ex-lover is killed, it's different. This is one death he can't let become merely an entry on a balance sheet. Because when the richest in the world are getting away with murder, sometimes the numbers just don't add up. From the award-winning Claire North comes an electrifying and provocative new novel which will resonate with readers around the world.