Arena Saga tells the story of the identity quest of Estefania, a 11-year-old girl living in Africa with her guardian Uncle Raïm, her deceased parents' best friend. When in 1993 looting disturbs the quietness of her city, Estefania follows Uncle Raïm in Perevy, a mysterious island hidden at the heart of the European seas. There she discovers the Arena legend, which fascinates as much as it terrifies the island's inhabitants.
And while she gets passionate about the legend and try to break its mysteries, Estefania incidentally starts piecing together the puzzle of her birth.