Can the five Aerialbots - Silverbolt, Air raid, Fireflight, Skydive and Slingshot - prevent Megatron from both destroying the Hoover Dam, and sending the energy to fuel the Decepticon war machine on Cybertron? They could in their giant, combined form of Superion...if, that is, they dared to remain in that form. Four-fifths of Superion are still a liability to human life, and with the Decepticon controlled human, Ricky Vasquez, in the firing line, that means big trouble for the heroic Autobots! Will the Aerialbots' first outing result in defeat? Will this spell the end of the Autobots on Earth - and Cybertron?