‘Rogue One: A Star Wars Story’ trailer: Another glimpse of Darth Vader

The Star Wars stand-alone film Rogue One has a third trailer, and it’s all about Jyn. Jyn Erso, that is.

Jyn, who’s played by lead Felicity Jones, becomes the de facto leader for a group of unlikely heroes in a time of major conflict in the universe. The ragtag team bands together on a mission to steal the plans to the Death Star, the Empire’s ultimate weapon of destruction.

WATCH: Rogue One: A Star Wars Story trailer: Darth Vader returns

The trailer opens with Imperial forces advancing on a farm, while Galen Erso (Mads Mikkelsen) comforts his young daughter, telling her that he’s doing it “to protect her,” before an adult Jyn wakes up in a prison cell. The trailer also shows Alliance forces breaking her out, and the Empire boasting about the immense power the Death Star gives them.

Then, at the end, we catch yet another milliseconds-long glimpse of Star Wars villain Darth Vader.

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READ MORE: George Lucas apologizes for saying he sold Star Wars to ‘white slavers’ at Disney

Another Star Wars “spinoff” film about Han Solo (starring Alden Ehrenreich) will arrive in 2018, while a third movie was recently announced for 2020.

‘Rogue One: A Star Wars Story’ will arrive in theatres on Dec. 16, 2016. You can watch the full trailer above.