Raised on their uncle's country estate, the four orphaned Sutherland sisters formed a close friendship with the young Princess Victoria. Shortly before her coronation as queen, Victoria asks the sisters to serve her in matters requiring the utmost discretion. They are to become her secret servants. Sister Holly's affinity with horses leads the queen to enlist her help when a prized Thoroughbred colt, a gift from the Ashworth family, disappears.
