During the Christmas season, Harley and Poison Ivy lure Bruce into a hypnotic shopping spree while Joker threatens Gotham with a sonic bomb loud enough to deafen anyone within earshot of its explosion.

Crime boss Edward "The King" Barlow dies and in his will leaves his arch-rival, the Joker, a large fortune. Joker immediately goes on a shopping spree, even searching for a replacement for Harley Quinn, but realizes too late that all the money is fake.

Robin fights to protect a young girl with amnesia who is being stalked by her "father", who turns out to be Clayface. Having created the girl from his own body to scout out the city, he now intends to reabsorb her.

During a fight with the Scarecrow, Batgirl is ambushed on a rooftop and falls to her death. Having watched his daughter's demise, Jim Gordon blames Batman for her fate and vows revenge, even recruiting Bane in the process.

Harley reflects on her first meeting with the Joker as she plots to eliminate her main competition in his attentions—Batman.