Desc: Como funcionan casi todas las cosas: Directed by Fernando Salem. With Esteban Bigliardi, María Ucedo, Rafael Spregelburd, Marilú Marini. Celina works at a remote tollbooth on a desert road, few days before Christmas, her father dies and Celina becomes a door-to-door encyclopedia saleswoman so she can earn enough money to travel to Italy and find her mom.