: Two inmates per level are fed by a stone slab (the platform) that descends from Level 0. Inequality

The film follows (Iván Massagué), a man who voluntarily enters a vertical prison known as "The Pit" for six months. His sentence? To help him quit smoking. Naive and idealistic, Goreng soon discovers the horrifying reality: each month, inmates are randomly reassigned to a different floor—from Level 1 (luxury) down to Level 333 (death by starvation).

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As Marcos navigates the harsh realities of the prison, he teams up with a fellow inmate, Pick de C (played by Antonio Durán), to unravel the mysteries of the facility and find a way to escape. The duo's journey is marked by intense drama, unexpected events, and a series of gruesome incidents that push the boundaries of human survival.