Most people believe that prices are constantly rising but in reality the cost of most consumer goods have been drastically falling over the past ten years. Libby Potter crosses three continents to reveal how 'cheap' has changed the world. In America, she visits the busiest mall on earth and the store that revolutionised the way everything is now sold. In Europe, she meets shopaholics and sees how one retailer totally transformed how we buy. She also goes shopping in the largest wholesale market in the world, discovers why Communist China is becoming such a large market and asks how long our addiction to cheap can last.