The detectives become a little edgy after working around the clock to find an abducted girl when clues point to a serial murderer and rapist who kills his victims on the third day. After trapping the killer, they are prepared to give him the death penalty until they find out that one of his victims was never found and he offers her location as a plea bargain.

A "Jack the Ripper" type murderer, who justifies his crimes with paranoid religious motivation set on by a rapidly deteriorating medical condition, is on the loose. After a citywide manhunt, Detectives Benson and Stabler are tasked with finding the killer.

The detectives are on the trail of a recently paroled rapist responsible for the murder of a prostitute during a raid at a men's club and are called to the scene where he was shot in self defense by his own gun. However, the murder weapon was also used in another crime while he was still in prison, leading the detectives to investigate the victim through a trail of previously unsolved cases, a spending spree and another victim. They uncover a more serious criminal in the process.