根据真实的故事改编。潘妮·切纳里原本是一个普通的家庭主妇，对赛马一窍不通。父亲生病后，将家族产业转交给她。面临重重困难，潘妮的表现如何呢？ 在赛马史上，一匹北美纯种赛马红极一时。它的名字叫做“勇敢统治者”，后来因为受伤退出了比赛一直被饲养在农场里赛马场的生意日渐衰退，1968年潘妮决定选择一到两匹母马和“勇敢统治者”配对其中一匹母马产下了一匹栗色的小马驹，潘妮在经营赛马场之前是一名秘书，于是她给小马驹起名为“秘书”。三岁时“秘书”参加了美国的肯塔基赛马会预赛中只取得了第三名的成绩。到了决赛的时候一开始它跑在最后，后来它一路加速以不到两分钟的成绩赢得了比赛，也创下了28年来的奇迹。之后它又赢得了鄱瑞克尼斯大赛的冠军，它的照片登上了《时代杂志》《新闻周刊》以及《体育画报》等著名杂志的封面成为了家喻户晓的明星，潘妮的事业也因此辉煌一时。 因为父亲的病重，家庭主妇彭妮·钱娜丽（戴安·琳恩饰）接管了父亲在弗吉尼亚州的马槛，对赛马一窍不通的她，赶鸭子上架的要开始经营马场，而她还要完成父亲的心愿，那就是让自己的赛马夺冠。面对重重困难，彭妮开始从零学起，她在马场里留意到了一匹名为"勇敢统治者"的纯种赛马，它是一头曾经红极一时的赛马，后来因伤而退出赛场，在农场务农，彭妮决定从这头赛马入手，开始自己的赛马之路。 彭妮邀请了老教练吕西安劳林（约翰·马尔科维奇饰）来进行培养和训练，最终，"勇敢统治者"所配种而产下的小马驹，赢得了赛马大赛的冠军，而彭妮也终于从一个对赛马一窍不通的人，成为了举世瞩目的赛马高手……
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