A teaching assistant at a private Buenos Aires school begins obsessively spying on her students in the early 1980s, as the public rises up against the military dictatorship.
Ana loses her mother after a sudden heart attack. He tries to avoid his feelings by feigning indifference. He doesn't stop doing anything he always did, until a message, left by his mother in a radio message box before she died, is accidentally deleted. Ana is forced to face reality.
