It's wintertime, with long nights and plenty of time for stargazing. One night, Krista senses that Shining Star is in trouble. She goes immediately to the magic spot and hears his voice, telling her that he's trapped - he's been caught up in a plot to steal some thoroughbreds from a local stable, and imprisoned with them.

How can Krista help? She realises that she must call in Star's brother and sister, North Star and Pale Moon ... but how can she find them?