Alternating between scenes set 25 years apart, the episode explores themes of regret and the danger of yielding to passion.
Anne Marie Henderson, 18 years of age, her young existence suddenly marred by a savage and wholly unanticipated pursuit by a strange, nightmarish figure of a woman in black, who has appeared as if from nowhere and now, at driving gallop, chases the terrified girl across the countryside, as if she means to ride her down and kill her, and then suddenly and inexplicably stops to watch in malignant silence as her prey takes flight.
Arrogantly forcing his way inside past an elderly retainer, David pleads with Anne to call off her wedding and be with him.
Her mother, having received another phone call from an otherwise unidentified lawyer, is devastated about losing the estate in a pending dispossession and seems uninterested in her daughter's metaphysical time-traveling marvel.
Anne disparages her now deceased father for spoiling her and not allowing her to earn anything or learn such things as judgment and discrimination.
Anne asks her mother if she remembers that night, 25 years earlier, when she came home terrified after riding her horse.
However, her husband is not Robert but the arrogant, pushy, mercurial David, with whom Anne eloped from her engagement party 25 years ago.