When your friend is a fabulous Wolf traveling between magical worlds, and kings and fabulous creatures ask for help every day, it is very difficult to be an exemplary schoolboy. But it doesn't happen otherwise with Petya: here he is learning a poem for a literature lesson, and five minutes later he is already flying through space to new adventures.This time, the legendary duo will have to find out why the Lukomorye disappeared, leaving behind a wasteland! All the inhabitants of the fabulous place have disappeared, and the sky is about to fall. But an Oak tree has grown in Petya's room and a panicked squirrel is jumping. Petya and the Wolf get down to business, and the Cat Scientist and twelve Koshcheev help them.