Join Thea Stilton and the Thea Sisters on this adventure packed with mystery and friendship!   The Thea Sisters are visiting friends at a lively festival in Spain. But the theft of a precious fan turns their trip into an investigation! They end up hot on the trail of a secret treasure . . . but they''re not the only ones searching for it. Can the mouselets solve the mystery in time? It''s a mission full of flamenco dance!