Poirot is enlisted by Japp to help solve a mystery that took place on Bonfire Night in a mews flat. A Mrs. Allen was found shot, apparently a suicide, but she was holding the gun that killed her in the wrong hand, and foul play is suspected. Furthermore, the ash-tray in the room contained the stubs of Turkish cigarettes smoked by one Major Eustace, a disreputable acquaintance.The victim was engaged to be married and seemingly had no cause to take her own life. Did she Or was it murder in the mew
Poirot pays what appears to be a routine visit to Dr. Morley, his dentist, but shortly after he leaves the clinic, the doctor is found dead with a gunshot wound to his temple, an apparent suicide. Poirot suspects foul play, and all those who entered the doctor's offices after Poirot left are suspect. They include Alaistair Blunt, a prominent and very influential bank director, Frank Carter, a young fascist thug with a personal grudge against Morley, Mr. Amberiotis, an enigmatic recent arrival from India suffering from a toothache, and Mabelle Sainsbury-Seale, a charity worker also recently returned from India. When Amberiotis is found dead in his hotel room from an overdose of Novocaine and Sainsbury-Seale disappears, Poirot rightly expands his list of suspects and connects the crime to events that occurred in India 12 years earlier.