In this book, the Koryzhki brothers—Dimka and Lyoshka—spend the summer at their grandmother’s dacha. Along with them, their cousins the Blinchiki—Alisa and Zhenyeka—are there too. Together they enjoy the summer holiday and help their grandmother with gardening and yard work. And the Koryzhki and Blinchiki also make new friends: Masha’s neighboring kids, Kolya, and their neighbor’s dog, Gronny. And together they unravel a secret. The kids come across an encrypted message from the past. The Koryzhki and Blinchiki need not only to find out who the message is addressed to, but also who sent it. This isn’t an easy task...