As a resolute Bobby, teamed up with with old timer, Diggory, set off after the killers, Ella is placed at the mercy of an unscrupulous priest and soon finds herself aboard one of America's infamous, Orphan Trains. Bobby and Diggory, now accompanied by his reluctant, young schoolteacher, Miss Halfpenny, are faced with the critical dilemma of searching for his sister, or the continued quest of his parents' killer. And so, a desperate pursuit ensues across America's still untamed and perilous Wild West.