Trapped on a primitive planet, two opposing factions, the Maximals and the Predacons, of Transformers, a race of sentient robots, fight over its precious Energon. Soon they discover that there are other forces at work on the planet - a powerful alien race that does not approve of their presence. And as they delve deeper into the planet's history, they uncover a terrible secret, one that must not be allowed to fall into the wrong hands, or their entire race's very existence could be threatened.
Set in the future after the events of the original The Transformers and the movie. Beast Wars introduces new classes of Transformers known as the Maximals led by Optimus Primal. And the Predacons led by Megatron. They are descendants of the Autobots and Decepticons. After crashing on a new planet they are forced to take animal form as the planet is largely poisonous to their robot form.