Somehow, a portal to another dimension is opened, and Bumblebee is sucked into it. Once seeing himself in a similar, and yet different place, he ends up seeing Steeljaw. The two threaten and almost fight, but their discussion is cut short by that world’s Bumblebee, who doesn’t have his voice box fixed and surprises them both.
After he escapes, Steeljaw apologizes for the inconvenience, and Bee is left completely confused over what just happened. Luckily, when Steel (he tells him he prefers being call this way) takes him to the steelmill and introduces him to his team, he explains that in that universe, the Decepticons are protectors of the universe, traveling in the Alchemor to fights against the ruthless Autobots. However, their ship was crashed and their companions lost around the Earth. Their only weapons are their “Autobot Attackers” (that world’s Decepticon Hunters).
That world’s Bumblebee reunites with his team and he plans to open a portal to his lord’s return, and the extraction of the planet’s energy sources would serve them on the subject.
As they get to know each other better, Bee ends up finding Steel loves the Earth as much as he does, and that he feels he has a home again. This makes Bee question himself over Steeljaw’s reasons, and how he never really wondered about it. Steel then points out how insecure he is over his leadership, despite having such a supportive and caring team. Surely is clear both have a lot in common.
“You think that… if your Steeljaw weren’t such a dreadful nemesis, you and him could have become-”
“Friends? I’m not sure… but it WOULD be worth trying if he gave me the chance.”
Well, the Decepticons do find out Bumblebee’s plans, but arrive too late; Nemesis Prime crosses the portal and fatally injures Steel. He however shows traces of insanity and claims the Earth for himself, calling his most loyal servent a weakling.
Steel is revived thanks to his team, who never really tried their weapons’ full potential. After their activate it, they manage to defeat Nemesis Prime once and for all. Bumblebee, despite his abuse, do show his hatred grew bigger, and as he runs away with his team, he swears revenge in his non-speaking way.
Steel and his team manage to get Bee a new portal, and he promises Steel that even if he doesn’t really become friends with his world’s Steeljaw, they would ALWAYS be Friends, and tells him to never doubt himself. Before he enters the portal, he also tells Steel he can use his catchphrase in that world, since no one was using it.