The story takes place in New York, and a detective is investigating a suspicious death involving allergens and allergic reactions. As the story unfolds, the detective begins to suspect that there might be a serial killer in New York City picking off people with severe allergies, but her superiors don't buy it. The detective builds a case - and eventually, the serial killer is unmasked and arrested.

After years of trying to prove there was a serial killer and then arresting them, the detective now begins to doubt that they have the right person in jail, and must try to convince her superiors and find the real killer!