The holidays are here and Harley is in full-on cheer mode! After permission from Poison Ivy, Harley sets up a party and invites all the villains in Gotham for one night of Christmas cheer. But one villain didn’t get the invite and wants to put an end to Harley’s unholy night. Can Batman infiltrate the festivities and save the villains or will this be the end of crime in Gotham?!