Before Optimus became a Prime ...he fought for order. Before Megatron became a conqueror ...he fought for freedom. Before they were enemies ...they stood against - Autocracy.

In the early days of the war on Cybertron, Optimus Prime puts everything on the line to unify the planet—but not everyone agrees that this new Prime should be in charge! Meanwhile, the fallen Decepticon leader, Megatron, begins a journey that will change everything!

Optimus Prime versus Megatron! Autobots versus Decepticons! At the dawn of the conflict, battle lines are drawn and sides are set... now legends will be made. The war that would define a planet begins in earnest—and its revelations will shake the Transformers' world to the core!