Ghost rider.

When Lisa, Carole, and Stevie head west to the Bar None Ranch, they have a great time planning a Halloween party with their friend Kate and John, a Native American boy who works on the ranch.

The Saddle Club is also thrilled when they get the chance to see a herd of wild horses, including the beautiful gray stallion that Kate wants to adopt.

Then John tells the girls a mysterious Indian legend about a gray stallion and warn Kate to keep her distance from the one in the herd.

Is john just playing a holloween trick, or is Kate about to ride into danger?

The Saddle Club is determined to find out!