A mysterious viral outbreak in New York City forces a disparate group of survivors to confront an ancient, predatory evil that threatens to consume humanity. When a commercial airliner lands at JFK with all passengers dead, Dr. Ephraim Goodweather, head of the CDC's Canary Project, leads the investigation into the bizarre biological anomaly. As the infection spreads with terrifying speed, he must navigate bureaucratic obstruction and personal turmoil to uncover the truth behind the vampiric contagion. The narrative unfolds through a third-person perspective, shifting between the clinical investigation of the CDC and the desperate survival efforts of those caught in the city's sudden descent into chaos.

The work is frequently noted for its cinematic pacing and the successful fusion of medical thriller tropes with classic horror elements. Readers often highlight the authors' ability to ground supernatural threats in a gritty, realistic urban environment. The narrative's focus on the mechanics of the infection provides a distinct departure from more romanticized depictions of the genre. Its reception reflects a consensus that the story functions as a high-octane, visceral exploration of societal collapse under the pressure of an unstoppable biological force.