While caring for her team of horses, fourteen-year-old Eliza Carter struggles with her twin brother's involvement with rebel farmers and an approaching war that might divide her family.
Erika Nagy's family has come to California in search for gold; however, their bad luck has forced Erika to go to work for their landlord, rancher Hart Latham, where she forms a special bond with an injured filly named Arany.
Fifteen-year-old Lexie McDonald, after the death of her father, disguises herself as a boy and sets out along the dangerous Pony Express trail in order to find her brother, Callum, who has been on the run for a crime he did not commit.