Plot

Release Date: July 3rd, 2007 (wide)

In the Arctic Circle during the 1800s, Captain Archibald Witwicky falls into an abyss and lands on a robotic hand partially buried in the ice. He finds staring back at him the eyes of Decepticon leader Megatron, who burns a map showing the location of the life giving Allspark into Witwicky's eyeglasses. These are handed down to his descendant, Sam, in the present day.

Elsewhere, Decepticon Blackout attacks a United States Air Force base in Qatar in the present day, grabbing and absorbing information from a computer while he destroys the base and deploys Scorponok. Scorponok chases Captain Lennox and his Special Ops team in the desert and in a village. Lennox then makes a phone call to The Pentagon, which sends a jet to fight off the Decepticon. Sam Witwicky buys his first car, which happens to be the Autobot Bumblebee.

Bumblebee helps Sam to gain Mikaela as his girlfriend. The Autobots come looking for Archibald's glasses, while hiding in Sam's yard, and the nefarious Sector 7 comes to invade Sam's house. The film eventually concludes with a battle that begins at the Hoover Dam and concludes in Los Angeles as Autobot leader Optimus Prime and Megatron face off.

Source: http://en.wikipedia.org/wiki/Transformers_(film)