The story follows Sonia and Arturo, who live in a safe-looking yet too big and secluded house. One night, three armed men raid the place. After violently subduing them and locking them in a bathroom, the criminals leave. Arturo manages to escape and catches the youngest and most inexperienced of them, deciding to kidnap him to "discipline" him in the basement of the house. As the rage dissipates, strange family ties that Arturo and Sonia thought were extinct emerge. A violent portrait of a divided society, in an unequal social framework where the boundaries between victim and victimizer become blurred.