"Transformers: Revenge of the Fallen" is a 2009 science fiction action film directed by Michael Bay. It is the sequel to the 2007 film "Transformers" and features the ongoing battle between the Autobots, led by Optimus Prime, and the Decepticons, led by Megatron. The story follows Sam Witwicky, played by Shia LaBeouf, as he discovers ancient secrets about the Transformers while trying to protect Earth from a new threat. In this installment, the Decepticons seek to resurrect Megatron and unleash a powerful device known as the Sun Harvester. Sam teams up with Mikaela Banes, portrayed by Megan Fox, and the Autobots to stop the Decepticons and save humanity. The film features intense action sequences and special effects, showcasing the transforming abilities of the robots.