This is the beginning of when the Transformers came to Earth because this all about the Allspark. The Allspark has the power to create a world and fill it with life, which is how their race was born. Some of them want to use it for good but the others want to use it for evil. Then they have a war savage by death between Autobots and Decepticons. Once the Autobots came to Earth to talk to Sam Witwicky and his girlfriend, but also Optimus Prime and the Autobots were here to look for the Allspark. They had to find it first before Megatron because the Autobots want to use the Allspark to rebuild their home planet Cybertron; then they end the War. So Sam Witwicky did not understand; then Optimus showed his memory to tell him what happened to his grandfather and about their home planet. Cybertron was in peace and trust; then they got betrayed by Megatron, the leader of the Decepticons. So the Allspark was lost to the stars. Then he followed it and he wanted to use the Allspark to build a new army and take over the universe. Sam’s grandfather’s name Captain Witwicky who just found him, but he accidentally activated Megatron's navigational system and his eyeglasses were imprinted with the coordinates of the AllSpark location. So the end of this movie, Sam Witwicky used the Allspark to merge with Megatron, which killed him. Then Autobots decided to stay on Earth as their new home.