Mean girls? In the world of "Divergent," it's murderous girls.

Summit Entertainment has released another featurette (below) that explores the world created by author Veronica Roth and being filmed by director Neil Burger. This one focuses on what it really means to be "divergent" -- when someone can't be categorized into one of the five factions into which society divides. Shailene Woodley's protagonist, Tris Prior, is one such person -- which puts her in a lot of danger.

"Divergents are not pure," explains Kate Winslet, who plays Erudite faction head Jeanine Matthews. "They are ruining the system, and the only way for the system to survive is to exterminate the divergents."

Woodley adds, "Tris does question the system, and that's an incredibly scary place to be in."

"Divergent" opens in theaters March 21, 2014.