La Peste écarlate

An old man walks around San Francisco Bay with his grandchildren. He is dressed in animal skins, hunting for food, warming up around the fire and protecting himself from bears or wolves with the help of bows and slings. It's now 2073. Sixty years ago, a terrifying disease, the Scarlet Pest, devastated humanity. The few survivors, who returned to the state of nature, gathered in tribes without a past or culture. The grandfather, a former professor, remembers the world before the epidemic: but how to tell Edwin, Hou-Hou and Bec-de-Lièvre, these little savages who can't read or count?