In the Beautiful Valley, in the village behind the Blue Mountain there is a pug house. The Smartest Pug Churchill, along with Fenya and Mulya, left on business, leaving Capitolina in charge. But Cookie, Josie and Mafi are completely out of control, they don’t listen to anyone, they make trouble and even fight. The older sisters decided to send them to the Imenalia Bulldog Gymnasium. They teach etiquette, arts and crafts there, each student has his own bedroom... But when the dogs got there, everything turned out to be completely different. And most importantly, it is impossible to get out of the gymnasium. Josie managed to rescue the Mouse King from captivity, he gave her some valuable advice that helped the pugs go free, save other dogs and learn to be friends. Mafi, Josie and Cookie understood: you can’t be offended by every word, and difficult tests are given so that you become better!