A nameless man lives alone in a house with a garden, working on his computer. Then a sparrow makes its nest under the roof of his house, much to the joy of the man: finally he has a friend! And also a boy from the neighbourhood comes to visit. These three understand each other almost without words, and have a lot of fun together. But then suddenly the sparrow disappears. And this happens at a time when the boy becomes seriously ill. When will the boy return from hospital and will he recover ? And where is the sparrow gone?

The book is bilingual, Czech-English, and includes comic spreads with separate episodes from the life of the main characters. Thus the book caters to multiple readerships: adults can read it to children who cannot read yet; beginner readers can enjoy the comics; and for those who are already learning English, the book will be useful on two levels: they can read the simple text of the comics as well as the more challenging narration, which has a rich vocabulary.