A mysterious viral outbreak in New York City threatens to transform the human population into a predatory, hive-minded species. Dr. Ephraim Goodweather, the head of the CDC's Canary Project, leads a team to investigate a plane landing at JFK where all passengers are found dead, only to discover a biological terror that defies conventional medical understanding. As the infection spreads through the city, Goodweather must navigate bureaucratic resistance and his own fractured personal life while battling an ancient, malevolent force. The narrative employs a third-person perspective that shifts between the scientific investigation and the grim reality of the encroaching infestation.

The work is frequently noted for its visceral, cinematic approach to the vampire mythos, stripping away romanticized tropes in favor of a gritty, biological horror aesthetic. Readers often highlight the collaboration between the authors as a successful fusion of dark fantasy world-building and grounded, procedural suspense. The narrative is characterized by its relentless pacing and the clinical detail applied to the mechanics of the infection, which distinguishes it from traditional supernatural fiction. Critics and readers alike observe that the story functions as a modern reimagining of classic horror, prioritizing the terrifying implications of a global pandemic over gothic atmosphere.