-For as long as she lived she would always remember that particular Christmas when she first met Xander Wilde. If she had known that the shy boy would one day become her worst enemy she would have left on the spot and never returned.- Lynn Parker begins a dangerous friendship with the adoptive son of her family's best friends. She doesn't know what kind of darkness lurks beneath the facade of intelligence and reticence until it's too late to escape the net that Jeremiah Valeska has been spinning for 15 years to keep her close.

Set during (4×21)&(4×22) Ever had a bad day and want to turn on your radio? Take a seat as Harleen Quinzel comes into Gotham with no tunes to lighten the situation as she steals a car belonging to the one and only infamous Jeremiah Valeska. The downside is her immediate death and a refusel to let her turn on the radio.