
The Philadelphia homicide squad's lone female detective finds her calling when she is assigned cases that have never been solved. Detective Lilly Rush combines her natural instincts with the updated technology available today to bring about justice for all the victims she can.

The bodies of four missing boys are found in a rented storage unit, sending the team in search of a serial killer.

The team investigates the 1963 murder of a teenage girl who dressed and acted like a boy; Valens learns the result of Internal Affairs' investigation of him.

Investigating the fatal shooting of a college student 25 years earlier, the team suspects several former coeds who accused him of date rape.

Lilly tries to determine whether a man's imprisonment in a camp for Japanese-Americans during World War II had any bearing on his murder shortly after his release.