When the body of teenager Julie Ann Collins is found in the underground car park of a Hackney housing estate, probationer WPC Jane Tennison becomes immersed in her first murder investigation.
When surveillance confirms the Bentleys' criminal plans, Bradfield goes against orders. A discovery by Jane provides the vital clue in uncovering Julie Ann's killer.
With the reappearance of Eddie Phillips, the investigation takes an unexpected twist. As Jane's relationship with Bradfield grows she is forced into a decision that may affect her entire career.
Time is running out in the hunt for the murderer. Meanwhile Jane and the team deal with the fallout from the Bentleys' bank heist. Will things at the station ever be the same again?
The inquiry into Julie Ann Collins' murder continues with the hunt for the driver of the car she was last seen climbing into. Things remain awkward between Jane and Bradfield after their kiss.