Norbert Piron, researcher at the Royal Institute for Cultural Heritage, is close to retirement. He's mandated by the Fine Arts Museum of the city of Verviers (Belgium) to list the collection intended for display in the new museum. Supported by his academic assistant Randy Paniandy, he consider this commissioned work as the high point of its career. Facing Géraldine Leroy museum communications manager pragmatism, his scientific and technical point of view encounters exacerbated emotional feelings. Originally, "La cascade" is commissioned by the architect studio V+. It is intended to be shown in an exhibition at the Palais des Beaux-Arts in Brussels. Note that crayfish soup is served in a real Napoleonic tureen.