A funny musical comedy about an adventures of children and adults in a summer camp.
The film takes place in Sweden at the beginning of the 20th century. Rasmus is a boy who lives in a shelter. Unwilling to stay in the orphanage, he escapes and joins a tramp nicknamed Oscar Tumbleweed.
Schoolboy Vasya and his little sister Klasha live on the shore of a picturesque lake, in which trout are bred. With the help of their friends, the dogs of the Quiver and the horse Strelka, the guys detain the poachers.