Sam Witwicky has found a job, but it has a few quirks, including invading Decepticons! After Laserbeam's attack, Sam and his new girlfriend Carly flee to Nest to join Bumblebee, Optimus Prime, and the rest of the Autobots. Meanwhile, Optimus Prime is showing Earth to the newly revived Sentinel Prime, Optimus's mentor, and Megatron is hiding in an African desert waiting for his moment to lead his Decepticon troops.