Picking up right where "Beast Wars" left off, Optimus Primal, Cheetor, Rattrap and Black Arachnia are finally going back to Cybertron, their home planet. However, all is not well, as they soon find out Cybertron is complete devoid of power and a race of drone machines known as the Vehicons are out to get the Transformers. Primal soon discovers that none other than the villainous Magatron and his Predacon are responsible for both the lack of power and the Vehicons. To make matters worse, there is a deadly virus that could kill them within hours. Will Optimus Primal and rest of the Transformers defeat Megatron and survive the virus? Will they manage to balance nature and technology before Cybertron is destroyed? Find out in these 26 action-filled episodes.