Night and Day

Harley Quinn #13
December 2001

As the book opens we are introduced to a couple who thanks to being exposed to a dose of unknown radiation, turn into a pair of murderous, highly evil creatures when the sun goes down. We then see that they are freed from captivity by the Joker, who after exposing them to a dose of his joker-gas, sends them on a mission to kill Harley Quinn. Meanwhile, Harley is trying to convince a reluctant Poison Ivy to join her on her road trip, but her attention is diverted when she is attacked by the duo the Joker sent her way. Seeing that these two are have been exposed to Mister J's gas, Harley sets about coming up with an antidote, but we soon see that the cure that Harley comes up with has an unforeseen side-effect, that further complicates the lives of these two. However, while she made their problem worse, Harley did manage to get these two off her back, and she's also able to convince Ivy to join her, as she leaves Gotham City.