Welcome back to Harley Quinn's crazy world on Coney Island...now get ready to wave goodbye, because everyone there just might get eaten alive! Harley's gotta protect her neighborhood against an all-out zombie apocalypse! Break out the chainsaws, everybody! Then, Harley must set out on a journey that will take her around the world-and into the clutches of a bizarre robotic enemy! And Harley carves her way through the rock underground of New York City, looking for the criminals who hurt someone she cared about...unfortunately, one of the crooks in question has fallen in love with her.