- Country: Russia
- Genres: Drama, Short
- Release: 2011-10-12
- Director: Andrey Zvyagintsev
- Writers: N/A
- Language: Russian
- Stars: Igor Evseev , Irina Barinova , Konstantin Demidov , Olga Efremova , Anastasiya Klyueva , Igor Sergeev
- Runtime: 7 min
- Awards: 1 nomination
- AKA: Tayna , Тайна (Russian Federation) , Tajemnica (Poland) , Mystery , Mystery (United Kingdom) , Mystery (United States of America)
- Plot: A woman hires a private detective to uncover her husband's secret.
- IMDB:tt2525004
Mystery Cast · · · ALL
Andrey Zvyagintsev
Director
Igor Evseev
Irina Barinova
Anastasiya Klyueva
Konstantin Demidov
Olga Efremova