The classified information about the find on the Moon became available 40 years ago. It turns out that American astronauts found the crashed Autobot spaceship and the remains of robots on the Earth satellite. The revealed secret again interferes in the relationship between humans and robots. Sam and his new girlfriend Carly find themselves in a new showdown between the Decepticons and the Autobots. Alien robots again started a global carnage because of the secret that the dark side of the moon kept for a long time.