Europe is seeing a clandestine emergence of illegal underground "No Rules" fight clubs: no rules, no rounds, no gloves. Young men are risking life and limb at these hidden events, which allow everything from biting and head-butting to eye-gouging and neck stamping. This world is one of unfiltered ultraviolence and raw instinct. Away Days got special access into this scene. We spent three years attending hidden brawls all over Europe to document what is one of the most authentic new countercultures on earth.

• Documentary