Former CPA and private investigator Claude Monday helps friends at the police department on a serial killer case, in which accounting statements are found at crime scenes. Trying to solve the clues—and wondering what, if any, relevance they have to the murders—Claude becomes so wrapped up in the case, he neglects his wife, Kay, and teenage daughter. When Claude misses an urgent call, Kay advises he quit. Not wanting more victims, Claude continues. Can avoid disaster? Or will the murderer succeed in tormenting him, worse than Claude could have imagined?