The Night Buffalo Guillermo Arriaga is an award-winning, internationally acclaimed writer already familiar to fans of his films, the Academy Award®-nominated 21 Grams and The Three Burials of Melquiades Estrada, which won a Palme d'Or for Best Screenplay at the 2005 Cannes Film Festival. The Night Buffalo is set in Mexico City, revolving around the mysterious suicide of Gregorio, a charismatic but troubled young man who was betrayed by the two people he trusted most.