Old Prof. Preobrazhensky and his young colleague Dr. Bormental inserted the human's hypophysis into a dog's brain. A couple of weeks later, the dog became "human looking". The main question is "Is anybody who is looking like a man, A REAL MAN?"

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.