The Shadow of San Anton investigates the history and rumors surrounding a central prison in Spain that is about to be abandoned. Just as the prison is about to close, doors to its hidden past are opened, but it is difficult to make people talk.
The documentary recounts the history of San Anton Prison from its establishment at the beginning of the Spanish Civil War, over the Franco Dictatorship, to its current image as an open prison about to be transformed.
People of Cartagena tell about the horrors that took place inside the prison, horrors that somehow escaped the history books. With their help we have been able to explore the prison and listen to its tales, thereby recollecting or rewriting a dark chapter of Spanish history, helping it to step out of the shadow and into the light.