"Gotham City meets Riverdale in this crossover graphic novel that brings together four of the most iconic characters in comics--Harley & Ivy and Betty & Veronica! Riverdale's resident billionaire, Hiram Lodge, has a plan to offer free college tuition. The town just needs to build a new campus by draining the wetlands that lie between Riverdale and Gotham City. Everyone is thrilled ... except visiting ecologist Dalia Green, a certain botany-obsessed super-villain in disguise! Poison Ivy realizes she must resort to drastic measures to thwart Hiram Lodge's plan to destroy the wetlands and the many species of endangered plants that live there. Scheming with her daffy bestie Harley Quinn, the villainous pair plan to kidnap Lodge's daughter, Veronica, and her friend Betty. Once Lodge abandons his building plans, Betty and Veronica will be returned safely--but not before mayhem ensues. Are these two teams of BFFs headed for disaster?"-- Provided by publisher.