Past Part 1.It happened on the Cybertron, a long time ago. The Autobot commander charged Hot Shot to train a young soldier named Wheeljack. Hot Shot and his trainee soon became the best friends. But during a battle Wheeljack was weighted down by the stone plate. Hot Shot couldn't release him single-handed and left him to get him help. Wheeljack promised to wait for him. But the commander didn't allow Hot Shot to return to his friend's side. Since then Hot Shot knew nothing of Wheeljack's fate and thought him to be dead. On the Earth a rookie makes his appearance on the A-Base. He is rather ridiculous and awkward youth whose name is Sideswipe. Once Blurr had saved his life, and now Sideswipe wishes at any price to serve under Blurr's command. Blurr, however, is not too much glad to have such a subordinate. So, by Optimus Prime's consent, he charges Hot Shot to take care of Sideswipe. Hot Shot is displeased that he has to fuss over such a misfit, of course. But he does his best to train Sideswipe though it is a very difficult task. One day, when returning to the Base after the drill, Hot Shot and Sideswipe notice a black car pursuing them. This car overtakes them and rams Hot Shot. Sideswipe tries to defend his trainer but the ominous black car throws him off the highway and then transforms itself into a robot. This is Wheeljack. He tells Hot Shot that it was Megatron who had found him and saved his life, and that he had joined up with the Decepticons since then. The episode ends with Wheeljack aiming a gun at Hot Shot.