Robby has trouble adjusting after their family's big move to the rural town of Witwicky, until he and his sister, Mo, discover the first-ever Earthborn Transformers.

Thrash is impatient with the family rules and convinces Mo to push their boundaries. But when a Decepticon needs their help, Mo and Thrash find themselves playing by a far more dangerous set of rules.

Robby backs out of Alex's traditional Wakwak hunt, so Alex shares his family history with Bumblebee, while Twitch, eager to gain her own traditions, encounters "Dad2" - Wheeljack.