When one of drug kingpin Luther Mahoney's "heroin mules" is found dead, Lewis (Clark Johnson) and Kellerman (Reed Diamond) mount an elaborate sting operation to bring down Mahoney (Erik Todd Dellums) once and for all. Elsewhere, Bayliss (Kyle Secor) finally patches up his differences with Pembleton (Andre Braugher), then braces himself for a meeting with the relative who sexually abused him as a child. And Munch (Richard Belzer) is informed that the so-called victim in an old murder case may still be alive -- little realizing that he is being set up as a pawn for a vengeful gangster. ~ Hal Erickson, Rovi