Batgirl (Batgirl Vol. 5 #18)

WHITE ELEPHANT

Batgirl goes to a Christmas party with her friend Frankie after dealing with a wannabe crook called the Wrapper. All of sudden, Harley Quinn crashes the party by spreading a poisonous gas, and challenges Batgirl to figure out "the reason for the season" within twenty-four hours in order to get the antidote. Given the answer is related to a guest called Bradley Burr whom Harley hates, Batgirl decides to look into his house, the local food bank where he volunteered back in college, and a church. They find Harley nowhere until Batgirl ponders that as far as Harley is concerned, the reason for Christmas are presents. Realizing the villain never left the local, Batgirl rides back there and forces Harley to hand over the antidote.