One day Goreng wakes up with his future colleague Trimagasi in the 33rd level of a prison style place, crossed by a hole where a platform descends with meal remains left from the tenants from higher levels. Trimagasi knows the rules that govern this mysterious place: two people per level and an unknown number of them. If you go upwards you survive… but think too much and you will descend again. If you are in the bottom where the food barely arrives, you cannot trust anyone except your guts.