It's the holiday season in Burnside, and everyone is getting into the spirit...including Harley Quinn and the Penguin! After the maid of mischief infects Barbara Gordon's company party with a killer virus, Batgirl must embark on a wild-goose chase around the city to find a cure. Meanwhile, a massive blizzard hits Gotham City without warning, and Batgirl must brave the bitter cold to discover the truth behind the storm. When the storm finally clears, Batgirl begins a thorough investigation into a string of attacks targeted toward women in Burnside. But she's not the only one searching. Can a father-daughter duo put their differences aside long enough to crack the case?