Myths, like fairy tales, are usually known by the names of the characters - Cinderella, Hansel and Gretel, Hades and Persephone. Her mother followed her and almost convinced Hades to let Persephone return to earth, but the heedless daughter did not obey warnings not to eat while she was in the underworld. She ate a single pomegranate seed so she could never leave entirely. She comes to visit her mother, Ceres, goddes of the harvest, every spring and summer, and when she goes back to Hades, Ceres causes all the plants to shrivel up. There are plenty of books on Greek mythology that are fun to read - try the one by Edith Hamilton.