According to science humans are the only mammals that are attracted to sour. Chinese medicinal believes says that 'sour' can help digestion and whet the appetite. In 3 traditional Chinese cuisines it is often used for balance but in south East Asian versions of Chinese dishes it is often quite forward even becoming part of the name of a dish particularly in traditional Peranakan Chinese cuisines. A cuisine (and a people) that Christine discovers for the first time. Christine joins Malaysian celebrity Chef Wan for a one of a kind experience, cooking in a traditional old Peranakan kitchen and making the food of Chef Wan's heritage.