The Underworld of Astra-1

There is a category of people for whom a simple, steady life isn’t enough. When it starts to get boring and monotonous, they look for adventures—right in the most “interesting” way. And, as a rule, they find them! So a group of young extreme sports enthusiasts, following clues from an old stolen diary, accidentally lands at a secret Soviet-era military facility where, many years ago, something truly terrible happened…