In a small attempt to expand the knowledge of Latin American plays and the biographical information of Jorge Diaz Gutierrez (1930-2007), I present one of his first plays La vispera del deguello, also known by El genesis fue maNana (1967). This project will inspire and benefit scholars, future translators, the theater community, and literature students to obtain a new perspective on Latin-American theatre. La vispera del deguello deals with existentialism; we enter the world of three remaining human beings on the planet: Custodio, Hosanna, y la loca (the mad woman). The structure of this project includes: the playwright's biography with the focus on his style rooted in the European literary tradition- and my translation of the play. Translating vispera del deguello is just the beginning of this project: future plans include producing, designing, and publishing the play. My contribution will be beneficial for a transatlantic dialogue among disciplines such as theatre, modem languages, and social sciences, among others. This project will expand the knowledge of the style of Latin-American theatre and recognize one of the best Spanish playwrights of the 20th century, Jorge Diaz Gutierrez.