This 60 minutes duet presents an encounter between two humans in a glass cage around which an audience is seated. Like laboratory rats. These two people do not know each other well. They gently try to create a common language in order to understand each other. Without words. They try. They learn before our eyes. A fourth wall separates the inside from the outside of this cage. A thin wall like a cigarette paper that sometimes becomes transparent and allows a more direct relationship between the performers and the audience. They discover that the two animals are not particularly special: they know how to do some things quite well and others quite badly. A peculiarity that they undoubtedly share with all the observers.