A group of scientists has succeeded, after numerous efforts to create a time machine functional. One member of the group is trying to join his colleagues try to tell them not to come to the office because they will all die. Fails. Therefore, the experiment started. The first time traveler is sent for an hour in the future and realize that the same room, an hour in the future is full of corpses. He decided to return to warn others, try to change something in the future. Will the group find out who is responsible for these crimes?