Demeter was the godess of fertility and abundance. Her daughter was named Persephone and they lived a very happy life.
One day Persephone went to the field and picked a basket of flowers to bring back to her mother.
When Persephone was on her way home, Hades kidnapped her and was planning to take her to the under world.
Hades had fallen in love with Persephone and wanted her to stay with him, be his wife, and help him rule the underworld. Persephone didn't want anything to do with the underworld and was very upset that she was away from her family.
She was offered a pomegranate and she ate 6 seeds. She then was forced to make an agreement to spend time with Hades, and be his wife.
Persephone made a deal with Hades that she would spend half of her time with him, and half of her time with her mother, Demeter.