In 1985, when the bipolar struggle between the United States and the Soviet Union was becoming more and more intense, Stallone directed and starred in the fourth episode of the Rocky series, which was designed to inspire and promote American spirit. This episode tells the story of Loki (Sylvester Stallone), a friend of the former American boxing champion, who goes to the Soviet Union to fight against their boxing robot. In order to avenge his friend and preserve his country's honor, Loki decides to go out again.　　Before the fight, Loki underwent a series of meticulous preparations, diving deep into nature and training hard in its harsh conditions. When everything is ready, the duel between Loki and the Soviet boxing champion, the boxing robot, begins!