Four New York City cops are dead, killed in an ambush that has the entire police department on alert and on edge. Chief of Manhattan Detectives Francis Tierney Sr. asks his son, Detective Ray Tierney, to lead the investigation, due to so much riding on the case and there being a cop killer on the loose. Ray takes over the case knowing the cops who were lost had served under his brother, Francis Tierney Jr., and alongside his brother-in-law, Jimmy Egan. It looked like a routine drug bust gone terribly...