Moscow Zero

In Moscow, the priest Owen hires a team to guide him in the underworld to find his friend Sergei that is missing while researching the legend about the existence of demons and an entrance to hell beneath the city. Andrey is the head of a group of Moscovites who live in the city's underground. Owen leads a rescue team in search of a Russian anthropologist who's disappeared beneath the underground system. They discover an eerie multilevel system of caves and catacombs. —Dark Horizons