Lisa's on the trail ride of her life! Lisa Atwood and Carole Hanson are going to the Bar None Ranch to see their friend Kate. Of course, the Bar None means horses, but this year there's also a cool archaeological dig going on nearby, and the girls are frequent visitors to the site. They're having a perfect trip--and what better way to enjoy it than with a bareback midnight trail ride to watch a meteor shower? On the trail ride, Carole falls seriously ill, and Lisa has to leave her to get help. But there are other people out in the desert that night, and they don't want Lisa to go anywhere. Now Lisa must ride for her life--and Carole's.