Zeus, the king of all gods, and his sister Demeter, goddess of the harvest, had a beautiful daughter named Persephone, and Demeter loved her very much.
One day Zeus's brother Hades, god of the dead, lives in the underworld, became restless and flew to earth and fell in love with Persephone and kidnapped her.
Hades tries to feed Persephone delicious food but Persephone knowing if you eat in the underworld you can't leave, refused but after a week she ate 6 pomegranate seeds
Demeter missed her daughter terribly and let all the crops and plants die and demanded Zeus to do something. Zeus sent his son Hermes to negotiate a deal with Hades to get his daughter back.
Hermes talked to Hades and this was the deal they worked out....If Persephone would marry Hades, she would live as queen of the Underworld for six months each winter. In the spring, Persephone would return to earth and live there for six months.
Every spring, Demeter makes sure flowers are blooming and crops are growing and the fields are green with welcome. Every fall, when Persephone returns to the underworld, Demeter ignores the crops and flowers and lets them die. Each spring, Demeter brings everything to life again, ready to welcome her daughter's return. To the ancient Greeks, that was the reason for seasons - winter, spring, summer, fall.