 Mike Brennan, a tough, crude, decorated NYPD detective lieutenant, has a dark side and a partnership with certain organized crime figures.Brennan shoots dead a small-time Puerto Rican criminal and then threatens witnesses to testify that he acted in self-defense.The Head of the District Attorney's Homicide Bureau, Kevin Quinn, assigns the case to Deputy District Attorney Aloysius "Al" Francis Reilly, a young lawyer and past police officer and the son of an NYPD cop killed in the line of duty.