The second official trailer for "Rogue One: A Star Wars Story" starts with a flashback of young Jyn Erso (Felicity Jones) and her father Galen Erso (Mads Mikkelsen):

Galen: "Jyn, whatever I do, I do it to protect you. Do you understand?"
Jyn: "I understand."

That sets us up for the rest of the action-packed trailer, which shows Galen as "critical to the development of a super-weapon" and shows more of Ben Mendelsohn's Orson Krennic, who is tasked with the completion of the Death Star.

"Rogue One" follows Jyn as she joins the Rebellion to steal the plans for the Death Star, in a standalone story set just before the events of the first Star Wars film, 1977's "A New Hope."

The trailer shows us flashes of Darth Vader, but he doesn't exactly have a starring role. Instead, the action is the real star, along with inspiring speeches from Jyn about hope, with Forest Whitaker's Saw Gerrera going full save the cheerleader/save the world to yell, "Save the rebellion, save the dream!"

Watch the trailer:

"Rogue One: A Star Wars Story" opens December 16, 2016.

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