Drug pusher Daniel Carr is acquitted of murder on a technicality. Rebus is blamed and investigated by Clive Dawson, once his best friend, now anything but. Carr and his obnoxious brother are murdered and chief suspect is Brian Robertson, another pusher, whose estranged son was Carr's victim. To complicate matters Carr's sister and Robertson's law-abiding son are in love and, whilst Dawson is honorable, his female assistant has been primed by the slimy prosecutor who really messed up the case to discredit Rebus. Fortunately Siobhan's loyalty and a series of anonymous letters come to the aid of Rebus and the investigation.
—don @ minifie-1