What is the Dalov incident talking about? I don’t understand.

In 1959, nine Russian skiers died of unknown causes while skiing in the Russian mountains. A group of students investigated the mystery of their true lives during a long journey. To this day, their deaths remain one of the most bizarre unsolved mysteries of the 20th century.

The film mainly tells a mysterious and bizarre story about time travel. Five American college students re-took the mountaineering route of the Dahloff expedition in the hope of finding the truth of the incident. It went well at first, but huge footprints were discovered on the first night of climbing. The expedition team fell into panic, and even found a A human tongue was discovered at an abandoned wind monitoring point. Under the persuasion of the heroine, everyone decided to continue investigating the Darlov incident. However, an avalanche suddenly occurred in the middle of the night when they were camping on the mountainside. One of the women died on the spot, and the other A man was also seriously injured in the leg. In desperation, the photographer fired a distress gun, but was shot by a former Russian soldier. In desperation, he had to escape into a mysterious cave discovered in the mountain the day before. The college student who had an injured leg They were killed by Russian soldiers, and a college student named JP among the remaining three was also shot and injured. The three escaped to the cave and discovered the former Soviet laboratory. Later, they were attacked by unknown monsters. JP was bitten to death, and the heroine and The photographer was chased by a monster into a wormhole. Finally, he tried to escape through the wormhole, but died on the snowy mountain outside the cave.

In the play, there are many foreshadowings, such as: the terrifying dream that the heroine has been having about the place where the story takes place, and the remarks of an old woman who participated in the rescue in 1959 about the 11 victims at that time. , the orange light that appeared when the incident occurred in 1959 (the actor in the play mentioned it jokingly), the incredibly fast climbing speed, the camera found in the laboratory, the legend of the local indigenous people, the monster in the laboratory did not kill the heroine and photographer, all of which hints that the two attacks and even the destruction of the former Soviet research base here were carried out by the heroine and the photographer.