The Endless Trench (2019)

During the Spanish Civil War, a man named Higinio hides in a small village and lives in a hidden trench to avoid political repression. He spends decades in fear and isolation, experiencing hallucinations and struggling with the memories of the war. His neighbor becomes his only connection to the outside world. As time passes, Higinio's secret becomes a burden, leading to revenge, betrayal, and the discovery of a hidden room that holds shocking secrets.