Two young and experienced female mountain climbers, climb a ridiculously tall (and rusty to the point of falling apart) radio tower with little to no gear or supplies, and without telling a single soul -  much less a loved one - where they were going beforehand. Pretty much every boneheaded decision gets made here and yet? It is still entertaining. Oh and if you are afraid of heights? Woof! This just might be the scariest movie you have ever seen.