Struggling to care for her ailing father, Dr. Harleen Quinzel meets with a dangerous new patient.
As her father's prognosis darkens and with every option exhausted, Harleen crosses a line with The Joker.
Harleen tries to make it through a site visit from Arkham Asylum's benefactor - Bruce Wayne - as The Joker's crime spree escalates.
Harleen meets with The Joker to make the exchange, and her father goes into surgery.
Harleen's encounter with Bruce pays off professionally, and The Joker exacts his revenge.
Harleen admits to her role in The Joker's crimes, but proposes a risky plan to make things right.