In Act of Revenge, Butch Karp and Marlene Ciampi pursue, survive, and triumph over two of New York's toughest and most dangerous criminal forces -- the Mafia and the Chinese gangs. As a chief assistant district attorney with a formidable reputation as a brilliant and fearless prosecutor, Karp takes on a difficult, complicated case involving the slaying of Ed Catalano, a capo in the Bollano family. At first the killing appears to be a continuation of old-style wars between Mob families, until Willie Lai, leader of a Chinese gang called the Ghost Dragons, tells Karp that he and his cohorts were involved.Complicating the investigation further is the obstructive and politically ambitious U.S. attorney who wants to use the Mob murder to advance his own career. His wife, Marlene, a private security consultant, is drawn into an investigation of the decades-old death of a notorious Mob lawyer. As she digs further, getting closer to the Mob's secret and shocking motives behind the murder, she, too, finds her life in jeopardy.