Pluto, god of the underworld, wants the beautiful Proserpina as his queen so he kidnaps her.
Proserpina's mother, Ceres, goddess of agriculture and life, placed a drought on the earth until her daughter was returned. But there's a compromise. Proserpina would spend half the year in the Underworld, and half the year with her mother.
This is how the ancients explained the agricultural seasons. The plants died when Proserpina was taken into the Underworld, and returned when she returned to her joyous mother.
The Rape of Proserpina (Italian: Ratto di Proserpina) sculpture by Gian Lorenzo Bernini in 1621.