When Kyveli arrives in Chios for her summer vacation and reunites with her best friend, Isidora, strange things begin to happen: she meets their peer Christopher Columbus, who claims to be a descendant of the Italian explorer, she sees again her friend's peculiar, elderly aunts, and a strong earthquake occurs on the island. But who is the mysterious man with the dark glasses who visits them? What will the three children discover in the basement of the house? What role did the year "1957" play in all their lives? Will they manage to solve this secret mission? Theme: Travels in Greece – CHIOS