The document summarizes the 2007 film Transformers directed by Michael Bay. It describes how the Autobots, led by Optimus Prime, arrive on Earth to search for the AllSpark cube and protect humanity from the evil Decepticons led by Megatron. The film stars Shia LaBeouf as Sam Witwicky, who unwittingly purchases the Autobot Bumblebee as his car. Sam and the Autobots must work together to find the glasses containing a clue to the cube's location before the Decepticons can use it to power their army and destroy Earth. The film was a box office success and launched a series of sequels.