In a dystopian future, Lucía, a young philosophy student, secludes herself in her grandparents' summer house. Her solitude is only hindered by the ‘Sistema Único de Salud’, which summons her for a new compulsory vaccination that she does not want to comply with, and she has only five days to solve the problem. Time moves forward between memories and encounters that Lucía has with her partner, her best friend and an unexpected visitor. In a poetic key, the film proposes a reflection on individual freedom and freedom of thought as the last trench in the face of a coercive system.