Transformers: Dark of the Moon continues the story of Sam Witwicky and his Autobot friends. While Sam struggles to gain a purpose in life outside of Decepticon attacks, the Autobots are off helping the government on secret missions. Then everything is torn apart by the discovery of the original Autobot escape ship, known as The Ark, and the captain of that ship, Sentinel Prime. He alone holds the key to technology that could either help reshape the Transformers home world or completely destroy ours. The Decepticons, completely aware of this discovery, make an immediate power play and the war is back, bigger than ever.