One Big Family chronicles the Kliafa soft drink company's almost 100-year history. Since 1926, family and friendship, playgrounds and neighborhood, innovation and solidarity, have been the “secret blend” of its luminous course. A small universe of creativity and humanity, built in Trikala, Greece, around one man’s vision "to cool and sweeten the world!” The film illuminates the work ethic and entrepreneurship of an entire era, and highlights the history of the people of the factory by emphasizing the small, unseen aspects of their daily lives.