Billy Hughes, a mute makeup artist working on a slasher film being shot in Moscow, is locked in the studio after hours. While there she witnesses a brutal murder, and must first escape capture at that time, then keep from being killed before convincing authorities of what she’s seen. Plot twists galore follow as Billy tries to stay alive. —imdb
This is one of the few films that grabs your intestines and twists them into knots for almost the entire duration. That and without the use of of any gore.