Accompanied by his extraordinary confidant Doudou, T'choupi discovers with wonder the small village of the seaside where he will live. The beautiful days of summer, the beach, freedom - Very quickly, the holidays are rich in encounters and adventures. He shares with Doudou all the events of his life, where joy and jealousy mingle; the family is growing, T'choupi now has a little sister, Fanny. But a mysterious shadow disturbs the happiness of the village children by stealing their favorite toys. With Pilou and Lalou, his new friends, T'choupi will conduct a thrilling investigation to unmask the culprit.

Kirikou's Grandfather says that the story of Kirikou and The Witch was too short, so he proceeds to explain more about Kirikou's accomplishments. We find out how little boy became a gardener, a detective, a maker of pottery, a merchant, a traveler and a doctor.