Carlota the assassin grandmother.

Carlota and her husband Adolfo live a simple life, surviving on their pension and worrying about their home in Chalco, State of Mexico. However, their world is turned upside down when a group of swindlers invade their uninhabited house in Chalco and falsify documents to sell it. While a network of legal corruption backs the invaders, Carlota is forced to fight for what belongs to her, confronting a rotten system that doesn't favor the innocent. What no one imagines is that this grandmother is willing to do anything to get her things back... even unleash her darkest side.