"we were once a peaceful race. of intelligent mechanical beings. But came the war, between the Autobots who fought for freedom... and the Decepticons who dream of tyrrany. Over match and Outnumbered...our defeat was all but certain. One Autobot had escaped the battle. it was carrying a secret cargo which would've changed our planet today. A desperate mission.
Our Final Hope. The hope...that vanished."

Optimus Prime opening narration