The animated film Transformers One throws us back to a time when Optimus Prime, going by the name of Orion Pax, is but a mere miner working in the belly of Cybertron: the planet that all ‘bots call home. With the disappearance of the great Matrix of Leadership which coincided with the death of the Primes who had been protecting Cybertron from aliens who wanted to steal the precious Energon… the death of all but one: Sentinel Prime. Now Sentinel is on a mission to find the Matrix of Leadership to return the world to its former glory and peace to all Cybertronians.