"Maze Runner: The Scorch Trials" cast
Kaya Scodelario and Dylan O’Brien, pictured at a screening of "The Maze Runner" in 2014, will reprise their roles of Teresa and Thomas in "Maze Runner: The Scorch Trials." Getty

The Gladers may have escaped WCKD’s experiment at the end of “The Maze Runner,” but their deadly adventure is far from over. After being rescued at the conclusion of the 2014 film, Thomas (Dylan O’Brien), Teresa (Kaya Scodelario), Minho (Ki Hong Lee), Newt (Thomas Brodie-Sangster) and the rest of the survivors will, once again, have to fight for their lives in “Maze Runner: The Scorch Trials.”

The first trailer for the film was released April 23 during 20th Century Fox’s 2015 slate presentation at CinemaCon, the convention of the National Association of Theatre Owners, in Las Vegas. In the trailer for the film, which is based on the second book in James Dashner’s “Maze Runner” series, “The Scorch Trials,” Thomas tells his allies he feels something is off about their saviors after discovering they were not the only subjects of WCKD’S experiment.

“They’re hiding something,” he says.

Thomas’ suspicions appear to be spot on. In the teaser, the voice of WCKD Chancellor Ava Paige (Patricia Clarkson) reveals that WCKD is ready to start “phase 2” of its experiment. Since Ava is so dedicated to the project she faked her own death in the first film, it’s safe to say she won’t give up too easily on the Gladers.

“The course of your lives will determine the course of humanity,” she says in a voiceover. “They could be the key to everything.”

Despite being warned not to leave their newfound, top-secret haven, Thomas and the team escape into the Scorch, a post-apocalyptic world caused by sun flares; one shot shows what appears to be San Francisco's Golden Gate Bridge covered in sand dunes. According to a synopsis for the film, not only will the world as they know it be changed, the Gladers will also have to face “unimaginable obstacles” on their journey.

“We can’t give up,” Newt tells Thomas, invoking all of their friends who died before their Scorch journey.

“They’re never stop, so I’m going to stop them,” Thomas says.

“Maze Runner: The Scorch Trials” premieres in theaters on Sept. 18. The film, directed by Wes Ball, also stars Nathalie Emmanuel, Aidan Gillen, Jacob Lofland and Giancarlo Esposito.