Transformers: Revenge of the Fallen is a 2009 science fiction action film based on Hasbro's Transformers toy line. It serves as the sequel to the 2007 film and the second installment in the Transformers film series. Directed by Michael Bay with writing by Ehren Kruger, Roberto Orci, and Alex Kurtzman, the film takes place two years after the original's events. The story follows the Autobots, led by Optimus Prime, battling the Decepticons under Megatron's command, while protagonist Sam Witwicky becomes central to their conflict after unknowingly carrying knowledge of the AllSpark in his mind.