Based on a tale from ancient mythology.
It tells the story of Callisto, a nymph and a follower of the godess Artemis. She was seduced and raped by the god Zeus who was in the disguise of Artemis. She became pregnant and when this was eventually discovered, she was expelled from Artemis’s group, after which a furious Hera, wife of Zeus, transformed her into a bear.
Sixteen years later, Callisto, still in the shape of a bear, encountered her son Arcas hunting in the forest. Just as Arcas was about to shoot his own mother. Zeus averted the tragedy by placing mother and son amongst the stars as Ursa Major and Ursa Minor, the two constellations in the Northern Sky.