Agatha Christie - A monogramos gyilkosságok (2019)

Hercule Poirot is peacefully dining when a young woman in the coffee house tells him that she, Jennie, will soon be killed. Jennie is terrified, but asks Poirot not to find and punish her murderer. "If I die, the truth will finally prevail."
That evening, Poirot learns that three guests at a fashionable London hotel have been murdered and a cufflink has been placed in the mouth of all three. Could the terrified young woman have anything to do with the murders? While Poirot tries to piece together the pieces of the bizarre mystery, the killer arranges a hotel room for the fourth murder...