The scales of justice are easily tipped . . . London, 1932. A brutal murder, a complex forensic investigation and a safe conviction - or so everyone thinks until D.C.I Mowbray hears the condemned man's last words. Now he needs Dr Jack Cuthbert to re-examine the case and prove that they have not been responsible for a tragic miscarriage of justice. But with no new evidence and both the victim and the killer in their graves, where can the pathologist begin? Might the unthinkable be true - have they hanged the wrong man? As Cuthbert struggles to find the proof, the case is also having a profound effect on his housekeeper, Madame Smith. Unbeknownst to him, a terrible secret from her own past in war-torn Liège has come back to haunt her.