What is the Dalov incident about?

During the period of 1959, nine Russian skiers died of unknown reasons while skiing in Russian mountainous areas, and a group of students investigated their real life mysteries during their long journey. Until today, their death has been one of the most bizarre unsolved mysteries in the 20th century.

This film mainly tells a mysterious and bizarre story about time travel. Five American college students have re-taken the road of Dalov's exploration and mountaineering, hoping to find out the truth of the incident. It went well at first, but on the first night of climbing, they found huge footprints and the expedition fell into a panic. They even found human tongues at an abandoned wind monitoring point. Persuaded by the heroine, everyone decided to continue investigating the Dalov incident. However, when they camped on the hillside that night, an avalanche suddenly occurred in the middle of the night, and one of them died on the spot. Another male was also seriously injured in the leg. In desperation, the photographer fired a distress gun, but it attracted the shooting of former Russian soldiers. In despair, he had to escape into a mysterious cave found on the mountain the day before. The college student with leg injury was killed by Russian soldiers, and the other three college students named JP were also shot and injured. The three of them fled to the cave and found the laboratory of the former Soviet Union. Later, he was attacked by an unknown monster and JP was killed. The heroine and photographer were chased to a wormhole by monsters. Finally,

There are many foreshadowing in the play, such as: the heroine has been having horrible dreams about the place where the story takes place, 1959, an old woman who participated in the rescue said that there were 1 1 victims at that time, 1959, the orange light that appeared in the incident (which the actor jokingly mentioned), and the strange climbing speed.