Irreverent Jack Doyle has worn many hats, one or two blown off by his irrepressible temper. A former boxer, advertising rep, and publicity man, Jack's midlife career has been shaped by the world of thoroughbred horse racing and dark deeds therein. So it's no surprise when two FBI agents he's sleuthed with before pressure him to identify an animal activist who is carrying out "mercy killings" of retired race horses donated to Midwestern university veterinary schools. Plus two Chicago senior citizens are being threatened by an imperious Internet millionaire intent on owning their beloved horse. Then a call comes from Ireland where the life of Jack's friend Niall Hanratty, the noted bookmaker, is under attack from an unknown enemy. Meanwhile Doyle's nemesis Harvey Rexroth, the rapacious media mogul Jack helped put into federal prison, enlists a fellow inmate, a mob-connected attorney, to have Jack killed. Carrying out this contract will be W. D. Wiems, a brilliant, frighteningly warped University of Kansas student who has eagerly launched a career of murder for hire. Fast tracking, Jack visits vet schools while juggling pieces of investigations near home and traveling twice to Ireland where his quest to find Hanratty's enemy takes him to Kinsale, Connemara, and a Dublin slum. Meanwhile the vicious contract killer is, all unknown, tracking Jack ...