Smoke bombs, pyrotechnics, balaclavas and punch-ups - welcome to the world of the football Ultras. Inspired by European terrace culture, a new generation of young fans are making themselves heard inside, and outside, stadiums across the country.
But is there more to the social media driven sub-culture that has swept through Scottish football for the past decade? Are Ultras a menace or a force for good in a game searching for relevance in a corporate footballing landscape?
The three part documentary itself underlines just how varied the Ultras scene is - so broad, in fact, that any single attempt to define it is destined to fall short.
