How can a set be made so that it can be seen both from the stage and through the screen in a streaming transmission? How is the ancestral knowledge of theatrical skills passed down backstage? How does a tenor prepare to sing for the first time the leading role of one of the most performed titles in the world? How does the dream factory that gives life to a lyric theater work? These and other questions find their answers in this documentary that records the production of La Bohème by Giacomo Puccini staged in 2018 at the Teatro Colón in Buenos Aires. Artists, craftsmen and stage workers give their testimony in a choral medium-length film that takes the viewer behind the scenes of one of the few opera houses in the world that is able to create in its workshops everything that is staged.