School is out for the summer, and The Saddle Club has big plans. Lisa, Carole, and Stevie have been invited to Wyoming to work on a ranch and help run a Western riding camp. The girls are looking forward to a great summer of fun and riding until Lisa's parents break the terrible news: They want Lisa to come to Europe with them for a month. For Lisa, it's bad enough that she'll be missing the chance to work as a ranch hand—how will she survive for four whole weeks without her best friends Stevie and Carole, and horses to ride?