Tortured by his conscience, the president of the United States often dreamed of the miserable situation after the nuclear war and was so stressed that he wanted to negotiate with the Soviet Union to abolish nuclear weapons. Federal Investigator Bob wants to assassinate the president in order to maintain America's nuclear advantage. At the same time, psychologist Paul is working on a way to get therapists into patients' dreams, guide them to overcome nightmares and treat sleep disorders. This technology is becoming more and more mature, so that the protagonist Alexei can enter other people's dreams with his mind. Finally, in the president's dream of the ruins of the nuclear war, the president, the assassin Tommy and the protagonist Alexei fought fiercely, and, of course, justice prevailed over evil. Tommy and Bob were both killed in their dreams. In this film, there is a general "rule" of the later virtual reality theme: if a character is killed in the virtual world, he will die in the real world. Although the later online virtual world is different from controllable dreams, it also inherits this "law". The scene of "Dream" is very grand, and it has the absurd and bizarre anti-logic color of the dream itself, which constitutes the changeable time and space scenery.