The tortured scream of twisting metal fills the air as – for the first time – TRANSFORMERS meet in battle on Earth. One of them is a relentless hunter without mercy, whose dark, alien mind is focused only on his goal. The other is sworn to protect life wherever he finds it, and defend the weak against those who would harm them. The two metal warriors trade blows as part of a war thousands of years old. BARRICADE rips chunks away from the armored body of his opponent, determined to serve his master MEGATRON to the very end, while BUMBLEBEE desperately scrambles to bring his weapons systems to bear before Sam and Mikaela get hurt.