EU-PO; LU-PO; is the secret question exchanged between Melia and Myrto just before they fall asleep. Two little sisters living on an island in the Aegean in 1936 listen to their grandfather talk to them for endless hours about his "ancients," eagerly await meeting their friends when summer comes, but above all, are crazy about the magical stories of the "kaplani" narrated by their cousin Nikos, a student from Athens. The "kaplani"—as they call it on the island, a stuffed tiger locked in the glass case of the grand hall of the house—sometimes looks with its blue and sometimes with its black eye, depending on its mood. What happens on a hot August day that disrupts the lives of the girls and their loved ones?

Who might want to harm the kaplani?