Harley Quinn becomes jealous of another woman in the Joker's life, and overcompensates by becoming even more of a doormat than usual to keep him with her. Joker uses Harley's jealousy to his advantage, until Harley figures out that's just what he's doing, and turns the tables on him by playing him at his own game...

After Harley Quinn gives a more than usual disastrous performance during a job, the Joker resolves to kill her once and for all. To prevent this, Poison Ivy bets the Joker that he can't be nice to Harley for a whole week, a challenge which Joker accepts, but which Harley turns out to be none too pleased about.

Something happens between the Joker and Poison Ivy which the Joker thinks is hilarious. But Harley Quinn doesn't find it very funny at all.

Poison Ivy leaves Harley Quinn in charge of taking care of her plants while she's away, with one rule: No Joker. Harley doesn't listen.

Harley Quinn's former colleague from the story "Legally Sane" is transferred to Arkham, much to her and Poison Ivy's delight. The Joker is not so pleased, especially when rumors start to circulate about Harley and the new doctor, causing him to take matters into his own hands.

The Joker is in a bad mood. Harley Quinn tries to cheer him up, but naturally makes a mess of things instead. And Poison Ivy understands for the first time what can only be described as their evil love.

The Joker kicks Harley Quinn out again. Poison Ivy, tired of the endless cycle, tries to make Harley stand up to him, and, surprisingly, it works. Harley dumps him, which Joker doesn't find very funny.

Harley Quinn and Poison Ivy pull off a heist soon after they meet. Harley wants to know if she 'done good'. Rated M for a reason. :P