Meet the clown princess of crime! When psychologist Harleen Quinzel met the Joker, the last thing she expected was to find love - but as the Joker preyed upon her mind, she fell for him, becoming the crazy sidekick Harley Quinn! Now join in on the action as Harley breaks her 'pudd'n' out of jail; forms a gruesome twosome with Two-Face; arranges an all-bad-girl slumber party; hires some henchmen; reveals her secret origin; and arranges a heist - on stately Wayne Manor!