Michael Knight and Lex Devlin agree to defend a jockey accused of murdering a fellow jockey during a race at Boston's Suffolk Downs. Michael's expertise in the machinations of the horse racing game is expected to serve them well. But a personal attachment to the murdered jockey thrusts Michael and Lex into the midst of conflict between Boston's Irish mafia and remnants of the terrorist branch of the Irish Republican Army. Now they are in the crosshairs...