Paul and Maureen Beebe's determination to own a pony from the herd on Chincoteague Island, Virginia, is greatly increased when the elusive Phantom and her colt are among the ponies rounded up for the yearly auction.

A foal, born in the aftermath of a great storm, and her famous mother help raise money to repair the storm damage on Chincoteague Island and restore the herds of wild ponies on Assateague Island.

Misty Inn is up and running, and the Dunlaps have a full house. Willa is thrilled that Kate, her best friend from Chicago, is going to come to Chincoteague for a visit. But it's been a whole year since they've seen each other, and Willa soon realizes their friendship is not as easy as it had once been. Adding to the tension is the fact that a Chincoteague friend, Sarah Starling, is away at camp for the week, not to mention the fact that Ben seems...

"A lost pony is cause for a nighttime adventure on Chincoteague Island in this third book of a chapter book series inspired by Marguerite Henry's Misty of Chincoteague. Full Moon Fancy, Fancy for short, is a pony with a knack for getting loose. First she just tramples a herb garden, then she knocks over a wall of a chicken coop, so the hens end up all over the yard and down on the beach. When she gets out one too many times, Willa and Ben are worried...

Busily preparing for an annual pony swim event, the Dunlaps learn that a famous travel writer will be attending who could attract valuable tourism to Misty Inn and their island home.

Even though Ben is allowed to ride and groom his sister's pony, Starbuck, everyone knows Starbuck is really Willa's pony: the two are inseparable, as close as a girl and pony can be. But then the kids discover a wild, renegade pony plucking apples from a tree, and Ben wants to keep him.