Detective Lilly Rush interviews a maid who says she witnessed the beating death of a teenage girl during a party on a luxurious estate over 25 years earlier.

A woman asks Lilly to investigate the murder of her fiancé's first wife and points a finger at an inmate serving time for an unrelated crime.

A serial rapist sends a letter to the squad, announcing his return to Philadelphia after five years, and his plan to strike again.

Lilly investigates the 1990 murder of a church organist who was found in an alley surrounded by crack vials and racy magazines.

Lilly investigates a case from 1973 involving a young police officer who was murdered after responding to a call at a drug-infested housing project.

A prison inmate relates a conversation he overheard to Lilly, leading her to believe the wrong man is serving time for the murder of a 16-year-old girl.