Hercule Poirot receives typed letters signed by A.B.C., giving the date and location of the next murder. The killer is working their way through the alphabet, leaving an ABC railroad guide with each victim. Why would A.B.C. write to Poirot instead of the Scotland Yard or any reputable newspaper? With Britain panicking, the fate of the nation is now in your hands!
Not to be confused with the DS exclusive Agatha Christie: The A.B.C. Murders; the two are completely separate, standalone games.