The Chinese Wall, Japanese palaces, Arabic highrisers, Persian residential courtyards, African mosques and European timbered houses - they all are built with clay. However the material itself had fallen out of fashion for quite a while. But now, the movement towards more sustainability in almost all areas of life has boosted interest in lay immensely. Architects, designers and even big businesses are rediscovering clay as a building material and its striking advances. A film about a very special construction material.