After Gotham is declared no longer part of the United States, the newly formed Injustice League tries to seize control of the city away from Harley.

Harley and Ivy go undercover as college students to take down Riddler, who's made himself dean of the local university with sinister plans for students.

Harley gets Catwoman to help her and Ivy steal a flamethrower they need to take on Mr. Freeze.

Harley goes after Freeze, while Ivy and Kite Man look for a wedding venue.

When Harley and Ivy spot a seemingly sane Joker, they debate whether people can change at their core, revisiting a flashback about Harleen Quinzel's first day at Arkham Asylum.

Two-Face has Harley and Ivy sentenced to life in Bane's prison, which is a giant pit in the ground; Jim Gordon and Batgirl vow to take back the GCPD headquarters from Two-Face.

Harley covers up for the "kiss" by going to Apokolips to get an army to conquer Gotham.

Alone on Christmas Eve, Harley reconnects with a now-sane Joker and heads to Wayne Tower, where their dinner is interrupted by an escaped Riddler and ParaDemons.

In order to defeat Psycho's army, Harley and Joker need to track down Fables' story book with the Justice League inside.

Psycho unleashes a mind-controlled Ivy, Clayface, and King Shark on the Justice League who are trying to free Gotham.

Harley crashes Ivy's wedding to stop Gordon and his officers from interrupting the nuptials.