Meet Macon. Tattoo artist. Athlete. Family man.

He's planning to run a marathon, but the event becomes something terrible.

During a warm-up run, Macon falls prey to a bizarre man and his wife who dwell in an underground drug-smuggling tunnel. They raise their twin children in a way Macon couldn't imagine: Skinning unexpecting victims for food and money.

And Macon, and his family, are next.