Humanity, believing all alien robots are a threat, launches a unit to hunt them down after a devastating battle in Chicago. However, they're aided by another robot searching for Optimus Prime. Cade Yeager, a robotics expert, discovers an old truck is actually Optimus Prime and helps him escape from the unit. They flee, pursued by the hunter, and uncover a conspiracy involving technology magnate Joshua Joyce.

Transformers: Age of Extinction
A family and a mechanic take in the Autobots and team up with them to defeat a ruthless bounty hunter and rescue Optimus Prime.