In a film set in Moscow, the crew is bustling about late at night as a young American director shouts to make a low-budget film in an old Russian studio. The Russian crew doesn't understand his instructions, and the actors' performances are a mess. After the shoot wraps up and everyone leaves, Billy, the special effects makeup artist, returns to the studio to retrieve a forgotten item. In the empty studio, she witnesses two Russian crew members filming something. In the next moment, she is shocked to her core—they are filming a snuff film.
Billy silently screams and tries to flee, but the killers notice her and give chase. Lost in the labyrinthine set, she desperately searches for an exit. Now a “Mute Witness," Billy becomes an unwitting target of the Russian mafia and the KGB. With danger closing in from all sides, she must use all her strength and wits to escape the nightmare.