Henri devient archéologue pour trouver le très ancien diamant bleu.

Henry meets a friendly Egyptian Statue in a museum. The Ancient Blue Diamond, centre piece of the museum, is gone and it's up to Henry to find it. Henry becomes an Archeologist for the day before returning the Diamond to its rightful place.

Henry is a young boy who desires to learn something new in his everyday life. In each episode, he meets a new object and his imagination comes to life as he learns more with each new encounter. Henry creates so many friendships and everyone he meets is eager to help him find the answers to every new question.