Matilda has a unique characteristic: when she wakes up each morning, she has a singular power which disappears the next morning when she wakes up with a new power. Only her best friend Charlie knows her secret.

Inspired by real events, "Bestia" enters the life of a secret police agent in the military dictatorship in Chile. The relationship with her dog, her body, her fears and frustrations, reveal a macabre fracture in her mind and a country.