When Meg’s parents go away for the weekend, letting Meg stay with fellow Pony Scout Jill, the Scouts get to have an extra-special sleepover! Meg, Jill, and their friend Annie will tend to Jill’s ponies day and night. But when one of the Scouts forgets to latch a pony’s stall, things start to get a little crazy. The Pony Scouts race to the rescue, and along the way they learn that being careful is an important key to being able to have fun.