The police teams from "Law & Order" and "Law & Order: Special Victims Unit" probe the gunshot murder of a man believed to be a sexual aggressor but the evidence points to the trouble-prone daughter (guest star Noelle Beck) of a wealthy family whose protective and haughty female clan leader (Emmy and Tony Award winner Jane Alexander) could make trouble for investigators and prosecutors alike. But when another duplicate murder occurs, the cops re-think their primary suspect while Detective Briscoe (Jerry Orbach) believes they might have stumbled upon new evidence about a serial killer who eluded him five years earlier. Mariska Hargitay, Christopher Meloni, Dann Florek, Richard Belzer, Michelle Hurd, Jesse L. Martin, Sam Waterston and Steven Hill also star.