After a weekend trip to Niagara falls and Montreal, Betty and Barney Hill make their way back to the home in Portsmouth through the NH White Mountains.
The Hill's are nearing their home but start to get followed by a strange bright light. They think at first that it's the moons reflection through the trees but Barney insists getting out and checking it out.
Barney Hill walks out into a field to get a better look and see's the bright light, is frightened and decides to get back into the car and try to drive home as quickly as possible, but before he makes it back sees a grey figure.
Though Betty and Barney do not remember immediately after the abduction they claim they are positive that the figure they saw that night was an alien and they bright light was a spaceship, and they were abducted.
They later remembered that while they were on the spaceship they were probed in uncomfortable places like their belly button, and when they were done they were dropped off back at their car in the white mountains and their memories erased.
It was not until later, when the two got hypnotized that the Hill's remembered what they endured while they were on the spaceship the night of their abduction. After realizing what they went through the couple was horrified and spent the rest of their lives researching and learning more about extraterrestrials.