Do you have your pinch of salt with you?
“The film does open with a lightsaber in space. It falls to the ground in a savannah environment during the day. It is quickly discovered by a farmer named Naka. Naka accidentally ignites the weapon and starts a fire with it. At first he runs, but then turns around and obtains the weapon … Naka then takes the weapon to his elder called The Vicar. The Vicar is most likely played by Max von Sydow … the Vicar appears to contact the Rebels and this brings Poe Dameron to the planet.
Later that night, Poe Dameron arrives and retrieves the lightsaber from The Vicar. The only problem? They’ve brought the Empire there as well (not sure if the Empire followed Poe or intercepted the initially transmission he received). Poe sees Stormtroopers are coming and he places the laser sword safely in a little droid: BB-8. The droid flees and the heroic Poe Dameron prepares to fight! Concurrently, a young Stormtrooper named Finn enters a situation that will drastically change his life forever. When his best friend dies in battle and he allows a few innocent villagers to escape, Kylo Ren orders him arrested and the village burned to the ground.
Because Finn just isn’t naturally evil enough, he finds himself in the brig of a Star Destroyer with a Rebel pilot. Finn never learned to fly. Finn has the knowledge how to get out of the brig and Poe is their best chance to fly out of there. They hatch a plan to steal a TIE Fighter and make a run for it.”
One more thing: J.J. Admitted that some of the rumors concerning the movie are true, after this opening scene was revealed…
Source: Comic Book Movie