Although her temperamental horse Pretty Lady is about to be retired, Polly longs to see her in the winner's circle and pursues plans to retrain her in time for the prestigious Travers Stakes.
In 1781, twelve-year-old Molly Randall, living with her family in Yorktown, Virginia, finds her courage tested when she must ride a powerful Arabian horse to get help for a neighbor about to be executed for treason by the British.