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1933. Hercule Poirot, older and greyer, receives letters threatening murder. The sender signs themselves only as “A.B.C.” When he takes the letters to the police looking for help, Hercule finds all his old friends have moved on. But soon there is a murder and the once-great detective must take matters into his own hands.
Hercule Poirot
Inspector Crome
Cust
Franklin Clarke
Megan Barnard
Lady Hermoine Clarke
Lily Marbury
Thora Grey
Beautiful Young Man
Betty Barnard
Capstick
Donald Fraser
Rose Marbury