BB-8 has important data: Thirty years after the events of Return of the Jedi, Luke Skywalker has vanished. On Jakku, Lor San Tekka gives Resistance pilot Poe Dameron a map to help find Luke. While Kylo Ren and the First Order destroy the village, Poe is taken prisoner. However, his droid BB-8 escapes with the map and encounters Rey, a scavenger.
Finn leaves the First Order: Stormtrooper FN-2817 (aka Finn), who was meant to fight in the Jakku battle, experiences moral conflict. He and Poe flee on a stolen TIE fighter. After crashing in a Jakku desert, Finn meets Rey and BB-8, and they set forth to get the droid back to a Resistance base.
Kylo Ren kills Han Solo: Kylo Ren, revealed to be the son of Han Solo and General Leia Organa, turned to the dark side at a young age and remains there under the influence of Supreme Leader Snoke. Han confronts his son and urges him to come back to the light. Kylo Ren claims to feel stuck but makes his definitive choice as he mercilessly kills his father.
The Resistance destroys Starkiller Base: Starkiller Base, the First Order's deadly planet-turned-weapon, destroys the Republic capital. Before it can successfully fire at the Resistance base D'Qar, a fleet of Resistance pilots takes it down.
Rey discovers she's Force sensitive: After being drawn to Luke's lightsaber and seeing disturbing visions, Rey exhibits special abilities — including using a Jedi mind trick. She wields Luke's lightsaber and uses the Force to overcome Kylo Ren in a final battle.
Rey finds Luke Skywalker: BB-8's map turns out to be a piece of a larger map held inside a dormant R2-D2. When the droid awakens, the Resistance completes the map, and Rey journeys to the specified location. On the desolate planet, she discovers Luke, who had exiled himself after Kylo Ren's destruction of his new Jedi Order. Rey presents him with his lightsaber.