At nightfall, Nounours and the sand merchant arrive from the sky on a cloud. Every evening, they visit Nicolas and Pimprenelle, ready to go to bed. Nounours listens to them, plays with them or consoles when they have grief. Then, he returns to his cloud and wishes, with his warm voice, "good night the little ones, made of beautiful dreams!" At the same time, the golden sand falls in rain on the bed of the two children who can finally fall asleep in peace.