Full-length feature film with animation elements for children aged 8−12 years and their parents. To save his classmate Lisa, fragile, dreamy Lesha (10 years old) commits a crime - he steals her mother’s talisman, a brooch in the form of a dragonfly, in order to sell it and buy Lisa a ticket to her mother, who married abroad, after which Lisa stopped growing altogether. Lesha goes through all the torments of punishment, changes, and as a result, both he and all his friends who participated in Operation Mukhadrakon (encrypted DragonFLY) have their most cherished dreams come true.