Deadman Wonderland is the world's first privately-owned jail, where inmates can compete in publicized events for a currency called "cast points". These can be used either to either live in comfort on the inside, or you can buy of increments of your sentence, should you have the displeasure of spending time there. There are no free meals, however, there is virtually no contraband, as long as you have the Cast to pay for it.
However, inmates on death row need to use cast points to buy "candy" which is key to their survival. Unlike with most death sentences, Deadman Wonderland inmates have a constant stream of poison being pumped into their necks. This is counteracted by this "candy". It is the antidote, and must be consumed every 72 hours, or the inmate will expire. Units are priced around 10,000 cast.
Though, some inmates will disappear on occasion... these are the "Deadmen", inmates that have supernatural powers surrounding the manipulation of their own blood, collectively called "Branch of Sin". Underneath the surface of DW, is another much shadier business, an underground arena that pits these "Deadmen" against one another, in fights to submission, or even death. This is the true Deadman Wonderland: Carnival Corpse. Win, and you win big, with an abundance of cast points and "candy". Lose, and much unpleasantry awaits...