If Willie could have his dream, he would go to Sable Island and ride free over the sand dunes on the back of a wild horse. Instead, 11-year-old Willie must work in the coal mines of Cape Breton, hardly ever seeing the light of day. But with the help of Gem, the gentle pit pony, he discovers that things aren't always as bad as they seem. And a surprising event reveals that miracles can happen, even in a coal mine.