The Maximals were returning to Cybertron after the end of the Beast Wars. All the Predacons had been destroyed. Or had they? Megatron hung onto to the outside of the shuttle the Maximals were flying home in .
Optimus Primal finds himself back on Cybertron being chased by attack drones. He's back to his original Beast Wars form and can't transform. What happened to Cybertron? Optimus' instincts lead him to find his old comrades Rattrap, Cheetor and Blackarachnia. Together the four find that Megatron now controls Cybertron. The Beast Wars are over and the Maximals have lost! And so starts the next chapter in Transformer history, Beast Machines.