A beautiful poison

In 1918 New York, as the Spanish influenza sweeps the city, socialite Allene suspects a more sinister cause behind the deaths of those in her circle. Each victim was poisoned, accompanied by a cryptic note. Driven by a passion for science and a desire to avoid an unwanted engagement, Allene reunites with her long-lost friends, Jasper and Birdie, to investigate.

As more lives are lost, the trio must race against time to unmask the killer before one of them becomes the next victim, all while navigating shifting alliances and rekindled affections.