Caged

Caged is a 2010 French horror film directed and co-written by Yann Gozlan and it is based on a true story. The film is about a woman named Carole who is traumatized after seeing her friend Laura being killed by a dog twenty years ago. Carole works as an aid worker in former Yugoslavia and begins to leave from Kosovo with two co-workers, when she is kidnapped by a Serbian gang of masked men who deal with human organ trafficking.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster © the film's rights holders.