After an old patient from Arkham Asylum left Harley Quinn an apartment building in Coney Island in his will, she has packed up her entire life to make the big move to New York. When her motorbike and sack full of junk are stopped at a red light, she is disturbed to watch a man dragging his dog across the street. Angrily, she fishes for a bullwhip from her sack, and snaps through the dog's leash before wrapping it around the dog-walker's neck. Gleefully, she adopts the dog on the spot, towing its former owner by the neck as she speeds through the now green light.