The Aldens are spending a week at the Dare to Dream Ranch, a rescue ranch that takes in horses whose owners can no longer care for them. The children help with chores, and Jessie is thrilled to be looking after a beautiful horse named Dragon. But when two of the oldest horses are missing from the pasture, a mystery begins to unfold--why would someone want to steal two old, sick horses? Then Dragon disappears, too, and the children discover that one...