Years after the Great War, the Autobot prison ship Alchemor crashes on Earth near Crown City, sparking a mass Decepticon jailbreak. Meanwhile, on a rebuilt Cybertron, war veteran Bumblebee is now working as a street cop, mentoring Cadet Strongarm. Bumblebee is alerted to the danger on Earth by a vision of a ghostly Optimus Prime, who directs them to a nearby space bridge. 

Season 2 sees Bumblebee's team split into two groups: an "away team" to search the world for far-ranging Decepticons while Bumblebee, Strongarm, Grimlock, and Fixit hold down the fort near Crown City. Still recovering from his humiliating rout at the hands of Megatronus, Steeljaw allies with a mysterious group of Decepticons led by Glowstrike and Scorponok, operating out of a crashed Cybertronian ship.

After defeating Starscream, Team Bee begins crossing paths with the Stunircons who can combine into Menasor. They must learn how to combine themselves to defeat the Stunitcons and other foes from the Shadowszone