1) Maleficent was once a kind fairy who lived in the woods until she had her wings cut off by a boy, Stefan, who she loved. This caused her to become bitter and vengeful.
2) As an adult, Stefan becomes king and has a daughter, Aurora. Maleficent, seeking revenge, curses the baby Aurora to prick her finger on the spindle of a spinning wheel and die on her 16th birthday.
3) However, Maleficent grows fond of Aurora and tries to lift the curse, but it may be too late. The film explores the perspective of Maleficent rather than the traditional telling from the viewpoint of the heroes.