A cop and his fellow Marine reservist friends embark on a risky, not to mention unsanctioned, mission in "Semper Fi."

Lionsgate released the official trailer Wednesday, and it offers a look at the upcoming drama starring Jai Courtney, Nat Wolff, and Leighton Meester. In it, we meet cop Cal (Courtney) and his younger brother, Oyster (Wolff), and see the lengths Cal is willing to go to when Oyster gets arrested and slapped with an unfair prison sentence. Cal hatches a plan to break his brother out, and he finds that his longtime friends don't plan to make him do it alone.

Of course, a jailbreak isn't exactly an easy thing to orchestrate. The trailer shows Cal's love interest, Clara (Meester), expressing her concerns.

"This is insane," she says. "You're going to get caught."

Watch below.

"Semper Fi" hits select theaters on Oct. 4. It'll also be available on digital and on demand.