Synopsis of "Transformers" Film

The planet Cybertron was ravaged by a civil war between the two Transformer factions, the Autobots led by Optimus Prime and the Decepticons led by Megatron, for the AllSpark, a cube-like object that is the source of all Cybertronian life. The Autobots want to find the AllSpark so they can use it to rebuild Cybertron and end the war, while the Decepticons want to use it to defeat the Autobots and conquer the universe. Megatron found the AllSpark on Earth, but crash-landed in the Arctic Circle and was frozen in the ice.

Captain Archibald Witwicky and his crew of explorers stumbled upon Megatron in 1897. Captain Witwicky accidentally activates Megatron's navigational system, causing his eyeglasses to be imprinted with the coordinates of the AllSpark's location. Sector 7, a secret United States government organization, discovers the AllSpark in the Colorado River and builds the Hoover Dam around it to mask its energy emissions. The still-frozen Megatron is moved into this facility and is reverse-engineered to advance human technology.