Okhota Na Piranyu (2006)

Under the guise of a couple on a romantic vacation, secret service officer Kirill Mazur and his colleague Olga go to the Russian Taiga. Their mission is to destroy a biological ammunition storage. They get trapped in a world where human rules are scorned and a deadly weapon is seized by gangsters. The gang's leader, 'Prohor', is a powerful and influential villain who sets up his own rules. His hobby is hunting--hunting for people. Mazur had never dreamed that he would trade his high-tech gun for a self-made ivory knife, nor did he expect to rescue his beloved companion and himself prior to saving the world. Mazur eventually learns that survival is a game without rules.