Take a look at the charity work of the four princes Philip, Charles, William and Harry. Through the business of their charities, they are transforming the British Royal Family into a modern global brand. But how did it all come about? And what motivates them? The Royal Family's approach to charity work changed in 1981 when Prince Charles married Lady Diana. We see how she became famous for her charitable causes before her untimely death and how her sons are continuing her legacy. The four royal charity entrepreneurs raise millions of pounds and help millions of people and in so doing, ensure the survival of the British Monarchy.