Spinning out of the runaway hit Batman: Beyond the White Knight comes an unforgettable coming-of-age super villain tale starring the children of Harley Quinn and The Joker! When the rebellious twins run away in a stolen Batmobile, only Joker Jack Napier's quickly fading hologram has any hope of getting them home safely and keeping them out of the family business. But a life of crime isn't the only temptation they are facing: the kids uncover a dark secret that could bring their dad back to life for good! With a wild array of Batman's former enemies and allies on their tails, will the kids succeed in reviving the Dark Knight's greatest foe? Find out as Jackie and Bryce take center stage in the White Knight Universe! Collects issues #1-6.