Housewife and mother Penny Chenery agrees to take over her ailing father's Virginia-based Meadow Stables, despite her lack of horse-racing knowledge. Against all odds, Chenery - with the help of veteran trainer Lucien Laurin - manages to navigate the male-dominated business, ultimately fostering the first Triple Crown winner in 25 years. Penny Chenery Tweedy and colleagues guide her long-shot but precocious stallion to set, in 1973, the unbeaten record for winning the Triple Crown.