Synopsis by Sandra Brennan
In this entry in the long-running western series, Hoppy and his pals must journey to Mexico after receiving a summons. Upon arrival, they realize that it was fake and that a good friend has been mysteriously murdered. They solve the puzzle with the assistance of the killer's feisty sister and a band of helpful caballeros.
bad-guy, border [geographic], cattle, employment, family-member, friendship, good-guy, group, help, investigation, investigator, killing, Mexico, murder, revenge, rustler, sister, summon, wife