How to be a Young Billionaire

SAN Francisco is home to the hottest new tech companies in the world. Dunn and Co have had an outlet there for years. It's a place where youth and brains count for everything, with some investors considering anyone over 30 past it. It's the one thing it's got in common with British clothes stores.
　　The cameras follow three different young British entrepreneurs who want to change the world and make a fortune using their smartphone apps.