'Spira Mirabilis' is an extraordinary new project drawing together some of Europe's finest young players. It offers a radical new approach to classical music making. Mostly in their 20s and 30s, these young musicians created a dimension in which to study, practice and perform symphonic repertoire together without the guide of a conductor. They were soon excited to discover that this different attitude also succeeded in breaking down many of the traditional barriers between performer and audience. The musical experiment developed by this group of committed musicians is the main theme of the documentary "La Spira", which focuses on the ideal embedded in this manner of "playing music together" and follows the practice in the course of work sessions and scenes from collective life.