Celebrity guests travel to developing countries around the world to connect with courageous young leaders who are igniting change under difficult circumstances. Cameron Diaz, for example, treks into the mountains of Peru to meet a medicine man who is carrying on his people's ancient traditions. Another episode documents hip hop artist K'naan's trip to Kenya to see a medical clinic and soccer program run by a local hero. Joaquin Phoenix, Eva Mendes, Casey Affleck, Mos Def, M.I.A. and Flea of the Red Hot Chili Peppers also take part.