Murder by the Invisibles

Inspector Duke Becker and the Special Investigations Unit, Homicide are down one man, Bobby Green is now on a medical retirement and working as a private investigator. He and Michelle Goldman can now have a real relationship and things are looking up, until a frightened conductor comes to see Green. Little does Green realize Becker and his squad will be investigating the same case and together they will confront a mad cult, a martial arts killer, and numerous citizens of the Big Apple found killed along the way. Along with a new Detective, known as Bing, a spiritual martial artist, Becker and his squad face something that could only happen in the streets of New York...and below it.