I actualy like this movie because its based on "SAW" concept and it has original idea. The people need to feel pain to get some sort of liquid that human brain is producing while human is in pain. The characters need to produce specific amout of this liquid to complete this process and leave.From this liquid is made a pill that is blocking pain for humans. I dont realy understand how it is working but fine by me. The people are just kidnaped by random but not now. The protagonists of this film is a group of friends and random people that are just there to just die and not more.
