The mechanics of this world are the same. The incoming prisoners, who all have different reasons for being there, are given the choice of what they will eat every day and a personal item to comfort or protect them. Every month, they switch from one level to the next. The higher levels are better and provide more food. The lower reaches promise starvation. There are some additional wrinkles. When Perempuan (Milena Smit) awakens, she finds the hulking Zamiatan (Hovik Keuchkerian) occupying her cell, too. They’re on level 24. She eats croquettes, and he eats pizza. The veteran inmates above and below have attempted to install what they believe is an equitable system: You can only eat your chosen food; you must not eat the food of those who have perished; the only way you can eat a different item is if you trade with someone else. That system, however, proves to be deeply flawed.