Why are we still able to watch moving images captured over 125 years ago? As we move ever further into the digital age, our audiovisual heritage seems to be taken increasingly for granted. However, much of our filmed history and cinema has already been lost forever. Film archivists, curators, technicians and filmmakers from around the world explain what film preservation is and why it is needed. Our narrators are custodians of film whose work behind the scenes safeguards the survival of motion pictures. It is a task they undertake based on their closely held belief in the artistic and cultural value of the moving image, in tune with a shared mantra that a film might one day transform someone's life. This documentary pays homage to them all and sheds some light on their critical undertaking.