The Master in Big Data of the University of Pisa is an annual course to become data scientists. In an increasingly connected society, big data record individual and collective behaviors with unprecedented accuracy. They are changing science and business, so that someone talks about a real revolution, and are becoming a key resource, the oil of the future. To manage this flow of information and exploit it in the best way, we need an ad-hoc professional. Designed for graduates of all disciplines, it provides the tools to work in the area of data analysis applied to all fields, from business to research. The Master in Big Data aims at training data scientists, professionals with a mix of multidisciplinary skills, which allow not only acquiring data and extracting knowledge, but also telling stories through these data and managing their ethical and legal implications.