NYPD detective Jack Kanon and Swedish reporter Dessie Larsson traverse Europe in hot pursuit of a serial killer, one who sends a postcard before each murder and was responsible for the slayings of Jack's daughter and her boyfriend.

While Eve examines a fresh body in Washington Square Park, her husband, Roarke, spots a man among the onlookers he's known since his younger days on the streets of Dublin. A man who claims to be his half brother. A man who kills for a living--and who burns with hatred for him. Eve is quick to suspect that the victim's spouse--resentful over his wife's affair and poised to inherit her fortune--would have happily paid an assassin to do his dirty work....