This is a compilation of four short video films, made in the La Tourette Dominican monastery near Lyon, which was constructed in the early sixties according to the plans of Le Corbusier and with the participation of mathematician, musician, and composer Iannis Xenakis.

A static camera records a musician playing a special instrument - a glass wall. He is enclosed in the space behind the glass wall, while the camera is positioned outside the wall. The musician improvises various rhythms on different parts of the glass wall, following the scheme of geometric musical rules devised by Iannis Xenakis. (VD)