Rosalie, the fairy of flowers, has more and more worries. In addition to lessons at the fairy school, she now needs to take care of her magical unicorn and prepare for the birthday of Headmistress Veterok. She also has to respond to a new wish letter from a child in the fairies' mailbox! It's no surprise that Rosalie has to ask someone for help in caring for the unicorn (even though it's forbidden). But what if all this makes her unicorn unhappy? Will she really not be able to cope with taking care of her new best friend and will he run away from her? It seems that if Rosalie wants to be a real wish fairy, she will have to learn to be responsible and considerate of her loved ones.