Megatron is building a disruptor ray to scramble the Maximals' circuits, but needs an organic lifeform who won't be affected by it to finish putting the shielding into place. He has one of the cave-human children kidnapped, and it's up to Rattrap and Depthcharge to save her.

While Inferno, Quickstrike and Waspinator go looking for a new ""colony"", Megatron discovers one of Tarantulas' secret projects - the reactivation of the gigantic Decepticon warship that shot down the Ark before it crashed into the sea.