When a young woman claims to have a 17-year-old "recovered memory" of her sister's murder, the whole squad tries to sort through the family's secrets. Meanwhile, Ali attempts to get a confession from a terminally ill man long suspected of being a hit-man.
Firemen responding to a house fire find a child's picture displayed on a computer. Ali's attention is aroused when the child is identified as a boy who disappeared and was declared dead 15 years before, but in the picture he is older than when he disappeared.
After a body is found at a construction site excavation, Ali and Tony look into the case of an Anglican priest missing for two years. Simon asks Ali out on a date after accompanying her to an official function.
After reading a letter from a recently deceased hit-man, Ali connects the murder of an elderly woman to the murders of several informants used in a drug task force Simon ran in the 1980s, and finds out there is an leak within the police force.
After being informed by Simon that the Cold Squad is being folded into other units, and that her position has been eliminated, Ali storms out of Dick's tavern. Digesting the news while driving her car, she hits a teen-aged boy standing in the street.
While Ali copes with the loss of her partner and Coscarella's undermining of her authority, Mickey fends off the unwanted affections of a defense attorney. Nicco investigates a murder involving a large wrench.
Ali is determined to build a murder case against a rock star, with or without Frank's help. Mickey and Nicco track down a man who deliberately wrecked his car for the insurance money, killing a child in the back of a parked car in the process.
When a fugitive from the US is captured, Ali investigates his claims that he killed two girls in Canada. If she proves his claim, he will serve life in a Canadian prison; if not, he will be extradited to face the death penalty in California.