After a salesman is murdered, the detectives turn their attention to the youngest daughter of a well-known family with some deep connections. But as they join forces with the officers from the two-seven, they realize that their case is connected with a long-unsolved case that Briscoe once handled years ago with his former partner Mike Logan.

The crossover continues in Law & Order S10E14 Entitled (II).

An elderly woman is found tied up and sexually assaulted in her apartment, and suspicion is initially on the young men that had broken into her home and robbed her, but once the detectives are surprised to learn that the rape was committed after the robbery – by someone else.

Observed by an FBI psychiatrist, the detectives uncover a horrifying motive for the slaying of a software company employee by a fired colleague when they learn of the suspect's bizarre relationship with his overbearing mother and a strange sexual fetish called piquerism.