Transformers: Revenge of the Fallen is a 2009 American science fiction action film based on Hasbro's Transformers toy line. It is the second installment in the Transformers film series and the sequel to Transformers (2007). Directed by Michael Bay, the story follows Sam Witwicky as he becomes entangled once again in the war between the Autobots and the Decepticons after his mind becomes a target for cryptic symbols.