In the third book in the series, Zia's secret ingredient takes Alfie and Emilia to the other side of the world - Hong Kong! Ying and her family are convinced that Alfie and Emilia are the foreign exchange students scheduled to visit them, and the siblings soon find themselves helping out with the opening of the family's new restaurant. Between shopping at the markets, assisting in the kitchen, and trying to get back home, Alfie and Emilia discover the sights and sounds of the exotic and bustling city.