Star Wars: Episode IV - A New Hope

The galaxy is in the midst of a civil war. Rebel spies have stolen plans to the Galactic Empire's Death Star, a colossal space station capable of destroying an entire planet. Princess Leia, one of the Rebellion's leaders, has obtained the plans, but her starship is captured by an Imperial Star Destroyer under the command of the ruthless Darth Vader. Before she is captured, Leia hides the plans in the memory of astromech droid R2-D2, who, along with protocol droid C-3PO, flees in an escape pod to the desert planet below the starships, Tatooine. Read more on Wikipedia.