The Maximals awaken on their homeworld of Cybertron, with no memory of how they got there. Unable to transform, they are hunted down by mindless Vehicle Transformer Drones known as Vehicons.

Seeking out allies, Black Arachnia and Cheetor discover that the entire Transformer population of Cybertron has mysteriously vanished. Rescuing them from a Vehicon attack, Optimus discovers the truth about Cybertron.

While searching out allies, Black Arachnia and Rattrap encounter Jetstorm, Thrust and Tankorr - three deadly new Vehicon Generals created by Megatron.

Rattrap discovers a counter-virus that helps him transform - but once he starts, he can't stop.

The Maximals discover a new Beast Mode Maximal - a bat named Nightscream - and a mysterious fruit tree, neither of which should exist on the machine world of Cybertron.

Rattrap finally learns how to transform, only to discover his Robot Mode has no weapons. With nowhere else to turn for protection, he strikes a deal with Megatron.

The Maximals discover a junkyard facility where the robot shells of the missing Transformers are stored. Meanwhile, Black Arachnia and Thrust discover a fatal attraction for one another.

Cheetor leads a dangerous mission to try and bring out Tankon's old Maximal personality. In doing so, Rattrap discovers a major clue to the Maximals' missing memories.

Nightscream fights to retrieve Black Arachnia's stolen Spark. Meanwhile, Optimus is able to contact Rhinox's Spark, but Rhinox deals him a major surprise.

Megatron sends the Vehicons after Nightscream to learn how he acquired a Beast Mode, and he must use all his wits to evade them. Meanwhile, we get the first hints that Tankorr is hiding a secret, and tensions grow between Cheetor and Optimus.

Tankorr orchestrates an escalating Techno-Organic war between Megatron and Optimus. Will Megatron activate his doomsday device - which will turn all organic life into metal?

Cheetor and Nightscream leave Optimus and the Maximals in an effort to stop the war before the planet is destroyed. Meanwhile, Black Arachnia tries to bring out the organic side of Thrust's Spark but discovers a shocking secret.

With the war at a standstill, Tankorr convinces Megatron that Optimus has a doomsday device of his own that he's about to deploy. Will his scheming lead to the destruction of both sides?