The third film in the "Divergent" series, "Allegiant," is about to debut in March, and this new trailer shows just how much trouble Tris and her friends are in once they get to the other side of the wall.

The wall appears to be a safe place, even a haven for survivors like themselves, but the team Tris has put together is about to be divided, as she is considered "pure," and they are not. Lionsgate debuted posters last week that presented the issue of genetic purity, but this trailer is the first time it's been said out loud.

With the threat of genetic manipulation and Tris' inability to rescue her friends, this first installment of the two-part "Divergent Series" finale looks like a game-changing film, and could shift the entire outcome of Tris' future.

"Allegiant" opens in theaters March 18 and stars Shailene Woodley, Theo James, Zoe Kravitz, Ansel Elgort, Jeff Daniels, Naomi Watts and Miles Teller.