Watch The Grass Dwellers for Free: How to Stream the Movie Online at 123Movies. . Juan Méndez Bernal leaves his house on the 9th of april of 1936 to fight in the imminent Spanish Civil War. 83 years later, his body is still one of the Grass Dwellers. The only thing that he leaves from those years on the front is a collection of 28 letters in his own writing.