Olya-lya from the sixth squad

The first of June was tumultuous for Denis, Yegor, and Sonya Strizhakov. They overslept their departure to the summer camp, for which they got scolded by their strict mom. Luckily, Uncle Vitya knows a shortcut. But the camp seems strange. Like something out of old Soviet films. A statue of a pioneer miner in the yard, children with red neckerchiefs, a principal with a peculiar name — Lina Petrovna… And the cheerful chatterbox Olya Nazarova… It seems Denis, Yegor, and Sonya have heard that name somewhere before? Exactly! That's their mom!