Optimus Prime and his band of Autobots are taken off the job when the Cybertron Elite Guard, led by Ultra Magnus, comes to Earth looking for the AllSpark.
Did You Know?
As you know I've scanned some typical earth vehicles, sir, so we won't attract attention to ourselves.
Good work Sentinel Prime, transform!
[they transforms into a heavy transporter and odd looking truck
Yeah, who's gonna notice that...