"I may be in the sewer, but you better get your mind outta the gutter! That rhymin’ zombie known as Solomon Grundy ain’t happy that I’m in his domain (but to be fair...it’s also Killer Croc’s domain too, there’s a lotta sewer dwellers in Gotham). Grundy’s either going to welcome me with open arms or crush me! And I can’t let that happen, 'cause Kevin’s at the mercy of Hugo Strange. Hugo’s going to do everything in his power to break Kevin and turn him against me, I hope in our brief time together, Kevin’s learned a little perseverance!" -Harley Quinn

In a very uncharacteristic moment, Harley Quinn and Solomon Grundy are playing a game of chess in the sewer while discussing how Harley is not a bad person. S.G. convinces Harley that she is good and she just needs to do things her way and stop trying to be like the Batman. Then Harley leaves to save her support group and her newest side kick, Kevin.

Meanwhile at SAFE headquarters, Hugo Strange tells Kevin that he will fix the ex Joker henchman, and if he can't Kevin will die trying. Hugo then injects Kevin with a new drug that causes Kevin to hallucinate.

Back on the streets of Gotham, Harley is making her way to SAFE headquarters to save Kevin. She uses a stolen Bat grappling hook to make it inside and fights guards all the way up the tenth floor where she is ambushed by Hugo and two of his goons.