In 1979 they had a political revolution, but today Iran is undergoing a revolution of a very different kind. Nearly three quarters of the Iranian population is under the age of 30, and many are bursting with dissatisfaction. Evan Solomon goes inside Iran to explore an underground world where young people are rebelling in very typically Western ways – punk bands, rap music, drugs, speed racing, defying gender roles – but face much bigger consequences breaking rules under an authoritarian government. Theirs is not a political rebellion; it's a social revolution, one that's young, dangerous and hidden. You could call it their Quiet Revolution. But just how much can Iran's young rebels change the country's current regime?