The adventures of a boy named Rostik and his friend, a dog named Kesha.
Rostik lives in a kindergarten, at a dacha (apparently, kindergarten kids used to go out of town for the summer?). And then he meets Kesha, a homeless dog, who asks him to help meet one boy living in a nearby village. But what if he takes him in?
Rostik agrees and runs away from kindergarten to help his friend. In the village they lose each other and experience a few small adventures.