While hiking in an isolated forest, survivalist Danny Coile and old Army buddy Arron James become hopelessly trapped when they fall into a deep dark cenote with steep walls and no way out. Over the next 85 five days, they transform from mild-mannered old friends into vicious, bloodthirsty animals willing to do whatever it takes to survive.

Geoffrey uses an experimental drug that puts him into an altered state where he is lured by a mysterious presence.

A group of supernatural outcasts meet to discuss their problems