On the express find a man killed by a dozen stab blows. The famous detective finds out that, wanting to avenge the death of a little girl, all the passengers of the train participated in the murder

On the express find a man killed by a dozen stab blows. The famous detective finds out that, wanting to avenge the death of a little girl, all the passengers of the train participated in the murder.
Part one. Facts
From the Syrian city of Aleppo, express trains leave for Istanbul. Detective Hercule Poirot is one of the passengers on the express train. In addition to him, Colonel Arbatnot, traveling from India to England, and the young Englishwoman from Baghdad, Miss Mary Debenham, who works there as a governess, travel in a carriage. Friendship is established between the colonel and the girl during the trip. Suddenly, the express stops due to a trifle breakdown. It is quickly eliminated, but the express loses time. Miss Mary is very worried: if she does not arrive on time, she will be late for the Orient Express, and she really needs to get on it.
In Istanbul, Poirot stops at a hotel. There he sees an elderly American man, Mr. Ratchett, who is accompanied by a secretary, Mr. McQueen. Suddenly, Poirot receives a telegram stating that he urgently needs to leave for London. He decides to use the Orient Express, but despite the winter dead season, all the seats are taken. Suddenly it turns out that one of the passengers did not show up, and the detective was given the vacant seat in the Istanbul-Kale wagon. Poirot’s neighbor is Mr McQueen. The train leaves for a three-day trip across Europe.
The famous detective is studying fellow travelers in his carriage. There are thirteen people: Italian Antonio Foscarelli, American Mr. Hardard, Russian Princess Dragomirova, elderly American Mrs. Hubbard, who is talking about her daughter and grandchildren all the time, middle-aged Swedish Greta Olson, German maid Princess Hildegard Schmidt, Count and Countess Andreni of Hungary . Poirot also sees among his fellow travelers Colonel Arbatnot, Mary Debenham and Mr. Ratchett with Secretary McQueen and a servant Masterman. It seems strange to the detective that people of different classes and nationalities gathered in one place.
Express arrives in Belgrade. A new carriage is added there, and Poirot occupies the vacated compartment. After two days of traveling, at night, a terrible scream is heard. Poirot looks at the watch and sees that it shows at twenty past one. He looks out into the corridor and notices a conductor knocking in a nearby compartment, which Ratchett occupies. Someone answers in French and the conductor goes to another compartment, because there a light came on.
Poirot cannot sleep for a long time. He hears someone calling the guide, then Mrs. Hubbard's voice comes to him. The conductor Poirot summoned complains that the American got on as if she had a man in the compartment. Suddenly, the detective thinks that something heavy knocked on the door. Poirot peers out into the corridor and sees a conductor sitting in his place and a woman in a red kimono embroidered with dragons.
In the morning it turns out that the train stopped. They fell into a strip of drifts, and now it is not known when the journey will continue. At noon, Poirot is summoned to the train chief in the compartment. Need help from the famous detective - Mr. Ratchett was found stabbed to death in the compartment. Seeing that the passenger does not go out and does not respond to a knock, the conductor decided to open the door with his key, but it was locked from the inside and locked to the chain. Entering the compartment, he saw that the window was open, and the passenger was killed by a dozen knife stabs. After examining the corpse, the doctor concluded that the blows were not done by a professional. Some were done with the left hand, others with the right, some were done when Mr. Ratchett was already dead. Due to heavy snow, no one could leave the car, therefore the killer is on the train.
Poirot speaks with the Secretary, Mr. McQueen. The young man worked for the victim for about a year. He cannot provide any information about his master, only that recently someone sent him letters with threats.
Together with the doctor, the detective inspects the compartment. No one could leave him through the window. The murdered man lies on his back, with a gun under his pillow. After examining a glass of water, and finding sleeping pills in it, they conclude that the victim was euthanized. In the ashtray are burnt matches of various shapes and a charred piece of paper. In the corner of the compartment is a piece of a cambric with the letter «H». A twisted clock on the chest of the slain shows half past one. The attention of the detective is attracted by charred paper, on which you can read: "..my little Daisy Armstrong." Now, Poirot understands who was actually killed.