The first book in the series introduces us to the twin heroines, Élise and Émilie. On a sunny Saturday, the two girls decide to go to their neighborhood park. On the way, they count their steps, admire the trees and flowers, and feed the ducks. A white kitten leads them to a wooden box that hides a map with three hidden "treasures." Following the clues, they find a paper star, a heart, and a small book with blank pages. The adventure ends with the message that the real gift is the time they spend together and the joy of discovery.

The book is suitable for children beginning French (level A1): the narration uses simple sentences and everyday vocabulary, and at the end includes a French-Greek glossary for understanding and review. This is the first chapter of a series that promises to accompany young readers on many more everyday adventures.