When Harley tries to get her first nemesis, she ends up with Robin and isn't happy. Batman comes to his ward's rescue, and Joker comes looking for the nemesis that he thinks Harley stole from him.

Commissioner Gordon loses a friend in Batman, but gains a new one when he interrogates Clayface's severed arm. Meanwhile, Harley and Clayface try to steal the arm back, and Psycho and Ivy visits the Cowled Critic who dared to criticize Harley's crew.