Martín Santomé is the main character in the novel "La tregua" by Mario Benedetti. He is a middle-aged office worker living in Montevideo, Uruguay. The story unfolds through his diary entries, revealing his thoughts and feelings about life, love, and the passage of time. As the narrative progresses, Martín reflects on his mundane existence and the relationships he has with his family and colleagues. His life takes a turn when he meets a younger woman named Laura Avellaneda, which brings new meaning and joy to his otherwise routine life.