Moscow Zero is a 2006 film directed by María Lidón.
An anthropologist called Sergei goes missing after researching a legend about the existence of demons and an entrance to Hell beneath Moscow.
A rescue team led by his friend Owen, an American priest, searches for Sergei in the caves and catacombs beneath the city of Moscow which are inhabited by demons.
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You can help Wikipedia by expanding it.This article about a 2000s horror film is a stub.