Willa is a wisp, a tiny child ghost who sits in the forest watching the children and wishing for a friend. When another little girl with a generous heart and an open mind becomes her friend, Willa is ecstatic. While they play, Willa's friend gets hurt and Willa needs to make the adults, who don't believe she exists, come to help. Can she do it? Can Willa make grown-up people believe?