Both Russell and Fixit are feeling like useless third wheels, even as the Autobots take down another Decepticon criminal, Bisk the lobster Decepticon. But a more sinister threat looms - Chop Shop the combiner! The Autobots must work together to prevent Chop Shop from fulfilling his plans. But when Chop Shop commandeers Fixit as his own appendage, can they bring themselves to fight their former ally?