Agustín forgets things; he is aging and he knows it. María is never alone: she watches over everyone, sleeps very little, and works too much. She’s increasingly overwhelmed. One day, on impulse, María decides to abandon Agustín.

Residents of an enclosed neighborhood in the middle of Mexico DF are shocked by a violent crime, and for one resident in particular, young Alejandro, the drama is ratcheted up when he encounters the lone kid who escaped the event and is hiding out within the neighborhood's borders.