When Elias van Dorne, CEO of the world's largest robotics company, introduces his most powerful invention, Kronos-a super-computer designed to end all wars-it determines that humans are the biggest threat and launches a worldwide attack on mankind. A small band of survivors must form an unlikely alliance to survive the greatest artificial intelligence threat man will ever know.

On their dying planet, the Autobots and Decepticons battle fiercely for control of the AllSpark in the Transformers universe's origin story.

The war that has torn apart their home planet of Cybertron is at a tipping point. Two leaders, Optimus Prime and Megatron, both want to save their world and unify their people, but only on their own terms. Outnumbered, outgunned, and under SIEGE, the battle-weary Autobots orchestrate a desperate series of counterstrikes on a mission that, if everything somehow goes right, will end with an unthinkable choice: kill their planet in order to save it.