Kroak is back with new adventures, and the bears and seals, the moon and the stars are still full of surprises.

Lune and Gââ follow a niurk-niurk in the cave of time. They will meet a mummy and a mastodon, La Fontaine, Napoleon, Vercingetorix... Documentary fiction as a pretext for a discovery of the collections of the Crozatier Museum in Le Puy-en-Velay.