The gap between rich and poor in Brazil is greater than anywhere else in the world - and that gap is nowhere more evident in the sprawling city of São Paulo, with its 15 million population living in conditions ranging from millionaires' penthouses to rat-infested tenements and shantytowns - favelas. This is where City Life meets the Posse - a group of six young friends, united by their love of rap music, trying to make the best of their lives against all the odds.