Gwen Robson, a middle-aged housewife who proves to have been a blackmailer, is found garotted in the car park of a suburban shopping mall. Wexford is no sooner on the case than a car bomb goes off and all but kills him, putting him in hospital. This leaves Mike Burden with the task of solving the case, but he goes off on the wrong scent. Wexford's analysis is better, though.