The Soviet boys, Vadik and Yura, together with the mischievous little girl Tosha, are children with a kind heart and good life philosophy. One day they find money on the street, which must be returned to the owner without fail. But where to find an inattentive citizen who has lost not only money, but also a booklet with quite important information. So, begins the time of exciting adventures, breathtaking moments, high-quality humor and instructive-entertaining ideological line.

School is over, final exams are behind — and Dima was the first to think of waving away from home. The convictions of his elder brother Viktor about a serious attitude to the future life only more “warmed up” the four friends, and for the first time they went to Tallinn for the first time without the bored care of adults...