31 Dias (31 Days) is the story of Eva (Irán Castillo), a young and beautiful psychologist and author of a series of self-help books about modern women and their love relationships. For her next bestseller she has decided to prove her most daring theory: After the first 30 days together love ends, so the only way to have a meaningful relationship in this new millennium is when the couple part ways after the first month. At a magazine's photo session Eva meets Adam (Lorenzo Balducci), an attractiv...