Prepare for more heavy metal mayhem as the evil shapeshifting robots known as the Decepticons return to Earth on a mission to take Sam Witwicky prisoner after he learns the truth about the ancient origins of the Transformers. It's up to the heroic Autobots and their leader Optimus Prime to rescue Sam but not before they encounter a new breed of bad guys, a resurrected enemy and an ancient evil with the power to destroy the entire universe.