A recently widowed 83-year-old goes undercover in a Chilean nursing home in a warm-hearted and surprising look at age, isolation and loneliness. Sergio is a Chilean spy - sort of. At least, he is offered the role of one after a casting session organised by Detective Romulo, a private investigator who needs a credible mole to infiltrate a retirement home. Romulo's client, the concerned daughter of a resident, suspects her mother is being abused and hires him to find out what is really happening. However, Sergio is 83, not 007, and not an easy trainee when it comes to technology and spying techniques. But he is a keen student, looking for ways to distract himself after recently losing his wife. What could be a better distraction than some undercover spy action? While gathering intelligence, Sergio grows close to several residents and realises that the truth beneath the surface is not what anyone had suspected. The film is a stylish combination of observational documentary and spy movie, resulting in a unique observation of compassion and loneliness.