A group of completely different people are trapped inside a cafe in Madrid; anyone that leaves is immediately shot by an unknown sniper. The streets are evacuated, and gradually, they come to realise someone in the group is the reason. It becomes clear that it is a government op and they are covering up the killings under the guise of a fire. Everyone inside the cafe turns against each other. Survival is not guaranteed, and it is unclear whether they will be saved by morality, modern lifestyles or primordial instincts from the enclosed space before matters becomes intolerable.