Harley Quinn has the blues. Her best friend, Poison Ivy, has just been nabbed by the Dynamic Duo. And her Puddin', the Joker, is locked up in Arkham Asylum. What's a supervillain girl to do? Capture the Boy Wonder to force the Dark Knight to set her friends free, of course! Can Batman and Robin escape Harley's crazy creeper caper? Or will the crime fighters be forced to free two of Gotham City's most notorious villains?