While searching for clues to their missing memories, Blackarachnia and Rattrap encounter Jetstorm, Thrust, and Tankor -- three deadly new Vehicon generals created by Megatron.

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

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, Blackarachnia and Thrust discover a fatal attraction for one another.

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

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

Megatron sends his generals and Diagnostic Drone into the catacombs to kidnap Nightscream and learn the secret behind his Beast Mode. Nightscream is forced to relive a painful memory from his past.