The continuous war between the Autobots and the Decepticons has brought great harm to the earth. For this reason, the countries of the earth jointly set up a response force to strangle all Transformers, regardless of good or evil. Cade Yeager (Mark Wahlberg), an earthling who has close contacts with Optimus Prime, ignored the opposition of those around him and the pressure of the government, and provided a shelter for Autobots such as Bumblebee and Grimlock on his own. During this period, he accidentally got a badge, thus bringing the crisis to himself. The missing Optimus Prime floated back to Cybertron, and was captured and blackened by Quintessa, the creator of the Transformers, who ordered him to return to Earth to find the supreme scepter, destroy the earth, and revive Cybertron. At the same time, Megatron and the Earth government reached an agreement to jointly track down the traces of Cade and his allies, and their goal was also the scepter that once belonged to the magician Merlin. The real crisis of the earth has finally arrived...