Moscow. Denis Viktorovich, his six-year-old grandson Denis, is brought to the old resident of the house on Karetny. Grandfather Denis tells stories to his grandson every day about his age, who lived in a completely different era. Denis's grandfather's stories become a portal to his carefree Soviet childhood in one of the Moscow courtyards. Stories come to life, and grandson Denis embarks on a journey into the past. It turns out that at any time, children have a lot in common — curiosity, spontaneity, immense love and interest in how this world works.

The film is inspired by the record-breaking solo trip around the globe in a hot-air balloon made by the world-famous Russian explorer Fedor Konyukhov in July of 2016. Throughout his remarkable life, Konyukhov has proven time and time again that willpower, perseverance and faith can help overcome fear and doubt, and lead a person to triumph.