Tunnels: The Darkest Nexus

Our physical plane is rocked next to ruin in this Supernatural/Horror/Action storyline, dealing with global and bizarre anomalies connecting our world to brutal creatures of dwelling within Purgatory.
Despite this known fact, folklore has mentioned fragments in time where mortals have been able to traverse through buildings made of stone and granite. Passing through without caution nor resistance, onto territory flooded with creatures brutish and perpetually lost as they too, traverse back to our realm.