In GOAT, Nick Jonas plays a frat bro named Brett with a heart of gold. But his allegiance to his Phi Sigma Mu brothers is tested when his real-life brother Brad (Ben Schnetzer) pledges his fraternity. Unlike his brother, Brad is socially awkward and not quite comfortable in his own skin; Phi Sigma Mu signifies the kind of self-assurance and brute strength that he feels he lacks following a traumatizing assault.

Full of dudebros high on testosterone, booze, and drugs, the frat's brutal and demeaning hazing rituals start to take their toll on Brad, physically and mentally. As Brad falls deeper down a destructive path, Brett becomes increasingly repulsed by the behavior he's witnessing — and guilty for subjecting his brother to more trauma.

Directed by Andrew Neel and produced by James Franco (who also appears in a memorable cameo), GOAT delivers an affecting look at modern masculinity and brotherhood on a college campus. In GOAT, every action is fueled by a toxic blend of insecurity and anger — and it's Jonas who finds himself in the middle of it.

Check out these exclusive stills from GOAT, in theaters and available digitally and on VOD on September 23, 2016.

Franco's character, a Phi Sigma Mu alum (and a grown-ass man with a baby), refuses to grow up.

Alpha male Brett (Jonas) is the life of the party.

The horrors of "Hell Week" begin.

This does not look like a fun time.

Brad (Schnetzer) is pushed to his breaking point.

It's all fun and games until your brother gets emotionally scarred, Jonas.