Persephone is in the meadows gathering flowers for her mother, Demeter. Hades is watching her from afar, admiring her beauty.
Eat my love.
Hades got Zeus in on the plan to kidnap Persephone, so Hades could marry her.
Where's my beloved daughter?
Hades snatched her from the field of flowers and brought her through the gates of the underworld.
Persephone refused to eat the food. She knew that once you have eaten food from the underworld she would be unable to leave it. Despite this Hades still asked as he was worried for her health. She warmed up to him and eventually ate three seeds. Now she belonged to him and she didn't mind.
Demeter became sad, not knowing what happened to her daughter. The world around her became a desolate place and flowers wilted. Helios told her what happened, as he was worried for the Earth.
Hades stroke a deal with Demeter. Demeter can see Persephone every year for six months a year, these being spring and summer. Every fall and winter Demeter became sad, thus making leaves and snow fall.