The continuous war between the Autobots and the Decepticons has caused great harm to the earth. To this end, countries on earth jointly established a response force to kill Transformers, whether good or evil. Cade Iger (Mark Wahlberg), an earthman who has close connections with Optimus Prime, ignored the opposition of those around him and the pressure from the government, and single-handedly provided shelter for Autobots such as Bumblebees and Steel Locks. During this period, he unintentionally obtained a badge, thus leading the crisis to himself. The missing Optimus Prime floated back to Cybertron, where he was captured and blackened by the creator of Transformers, Kuntasha, who ordered him to return to Earth to find the supreme scepter, destroy the Earth, and revitalize Cybertron. At the same time, Megatron and the earth government reached an agreement to jointly track Cade and his allies. Their target was also the scepter that once belonged to the sorcerer Merlin. The real crisis for the earth has finally arrived...