Tadashi Kawamata has responded to the invitation of the Kunstmuseum Thurgau located in the heart of the former Ittingen Charterhouse in Switzerland by building in situ with students and collaborators of the foundation a tower nine meters high consisting of thousands of logs of firewood from the forest of the monastery. The construction of this "Log Tower" is both a feat of stability and an aesthetic experience that crystallizes fundamental issues around contemporary art such as the notions of use or disappearance. Gilles Coudert's film shows us the process of construction of this collaborative work developed with the architect Christophe Scheidegger and restores this adventure through the testimonies of the inhabitants, the students, the organizers as well as the various actors of the project and the feedback from visitors