A mistake

Ke Dao (played by Chang Lantian) works in the editorial department, and recently his wife (played by Zhang Limei) ) found that he was mentally abnormal and a little neurotic in his words and actions. After questioning, he found out that he was troubled by Sima Wen's thrilling story of "The Right Way" and was trapped in it and couldn't extricate himself. His wife took him to see a doctor, who asked him to go on a trip to relieve his mood. On the luggage rack of the train going to other places, there were three identical suitcases, one of which belonged to Ke Dao. Not long after the train started, Ke Dao felt thirsty and wanted to get a cup. When he looked up, there was only one suitcase left on it. When he opened it, he was shocked to find that there was a dismembered human body inside. The couple looked at each other and were at a loss. I wanted to call the police but was afraid that the murderer would be retaliated while he was still in the car. I wanted to find my suitcase, but when I took a quick look at it, I saw that there were many identical suitcases on the luggage rack. Which one was my...