"Harley's back in Coney for a long-overdue reunion with old friends, old haunts, and...an old time machine?! Yep, you read that right. A mysterious benefactor has left Harley a time machine. What could go wrong, right? Funny you should ask. Turns out the entire DC Universe--including Wonder Woman, the Flash, Aquaman, Batman, and li'l baby Supes--is thrown into chaos, and not the fun kind. Thing is, Harley ain't gonna have an easy time fixing her reality-shifting screw-up, because Starro has assembled a Suicide Squad of his own to conquer this new reality. But with a time machine and a tough, scary, alternate-universe Harley at her side, maybe--just maybe--she can make things right again. And--wait--who the heck gave Harley Quinn a time machine in the first place? The answer needs to be seen to be believed!"--Back cover.