Determined to become one of the vaunted Legion of Doom, Harley attempts to make a big splash by crashing one of their criminal enterprises with the help of her BFF, Poison Ivy.

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.

When The Joker runs for mayor of Gotham, Two Face attempts to sabotage his campaign.

Lex Luthor keeps Ivy on a short leash at a conference on the moon, while the Bat Family rents out Wayne Manor after Talia slashes company finances.

Harley’s desire to spend more time with Ivy sends them to a post-apocalyptic future. Batgirl seeks out a killer. Joker gets caught in a lie.

In a bid to stop Lex, Ivy competes in a celebrity golf tournament. Meanwhile, Harley learns a dark truth about herself... from herself.