Optimus Prime, leader of the benevolent Autobots, narrates the collapse of the Transformers' home world, Cybertron. It was destroyed by war between the Autobots and the malevolent Decepticons, lead by Megatron in his quest to get hold of the All Spark. The Autobots want to find the All Spark so they can use it to rebuild Cybertron and end the war, while the Decepticons want to use it to defeat the Autobots and take over the universe. Megatron had managed to locate the All Spark on Earth, but crash-landed in the Arctic Circle and froze in the ice. A very popular choice for boys ages 5 - 8.