Many years after the events of
Predacons Rising, Cybertron's genesis brings forth a new age of prosperity to a new generation of Transformers. Earth no longer remembers the Decepticon-Autobot conflict as Cybertronians stopped visiting the planet.
Bumblebee has since become a seasoned Cybertronian
police officer and despite his fame, he chooses to be a humble peacekeeper. Things change when he is summoned by the vision of
Optimus Prime. Thought to be long dead after restoring Cybertron, Optimus calls for Bumblebee to return to Earth as a new threat appears.
With the help of
Sideswipe (a rebel "bad boy bot") and Strongarm (an Elite Guard cadet partnered to him), the trio makes it to
Earth to discover a crashed maximum security prison ship called the Alchemor and its
steward Fixit (a hyperactive
Mini-Con with faulty wiring). They soon learn the ship had at least two hundred Decepticon prisoners within Stasis Pods, but all of its inmates have escaped. It is now their duty to recapture all the escaped Decepticon prisoners before they cause further harm on Earth. With the aid of humans Russell and Denny Clay and the
Dinobot Grimlock(who was a prisoner of Alchemor before siding with Bumblebee). Bumblebee leads this unlikely team to protect Earth from the Decepticon prisoners led by
Steeljaw and restore order. Bumblebee's group also have to prepare for the arrival of the
Fallen of whom the
Thirteen Primes have been preparing Optimus Prime for.