The plot summary at IMDB.com is incorrect. It says:
An engaged heiress is terrorized by a middle-aged woman on a horse pleading with her not to go through with her impending marriage.
The actual plot is, "An engaged heiress is rerrorized by a middle-aged woman on a horse, while she tries to decide which of two suitors she should marry.
It opens with the woman riding a horse down a road. Then, a female figure on a horse, wearing a black cape that flaps in the wind and makes her look like a witch, arrives at the top of a cliff and screams at her, and then charges down the mountain toward her. To no one's surprise, the woman flees, and arrives home in tears.
Okay - here's the "twist". The middle-aged woman in the flapping cape is an older version of the young girl, desperately trying to get her to not marry the man she marries (who is not the man she is originally engaged to.) He - Roger Davis, turns out to be an alcoholic who spends all her money, makes her miserable, and apparently turns her into a harridan.
Now, obviously, the woman on the horse with flapping cape is a great visual, which is why they did it that way, but in real life, is that any way to approach someone whom you need to warn them about not doing something? By appearing so dramatically and chasing her younger self, all she succeeds in doing is scaring the woman away!
So the lesson here is, if you need to talk to someone,don't be all dramatic and threatening. Approach slowly, talk gently, and make sense!