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? New York Times best-selling creators Hope Larson (A Wrinkle in Time) and Rafael Albuquerque (American Vampire) present Batgirl Vol. 4. Collects issues #18-23.