With Carly's help, Sam manages to get a job at Bruce Brazos' aerospace company in Washington, D.C. Meanwhile, Optimus Prime and the Autobots land on the moon to investigate the wreckage of the Ark, a spaceship that ran aground a few years earlier. There they find their former leader, Sentinel Prime. He is in a sorry state, but this does not discourage Optimus from trying to bring him back to life.