New adventures of Luntik and his friends — Kuzi the grasshopper, Pchelenka, Elina's butterfly, the caterpillars of Vupsnya and Pupsnya and others. This time, the cheerful company decides to help Luntik find his mother and return home to the moon. To do this, Luntik needs to climb the Black Mountain, the road to which is full of adventures and dangers.