- Ballard's trail jumpers attack the Wyatt Company wagon train, killing young John's parents and kidnaping his brother, Jim. In post-Civil War California, John Wyatt, now a man, pulls together a vigilante posse, The Singing Riders, who all ride white horses, dress alike, and ride the trails singing and rounding up outlaw gangs. Meanwhile, John is ever on the lookout for the gang that murdered his parents.
- 40年代的洛山矶唐人街,警员杰克(杰克·尼科尔森 Jack Nicholson 饰)因不满这里的黑暗,辞职当起了私家侦探。这天,一个自称莫拉雷太太的女子请杰克调查丈夫的外遇,杰克欣然接受。杰克发现莫拉雷原来是当地水利总工程师,正在为兴建水坝问题和当地农民争执。随后有人给了杰克一些证明莫拉雷偷情的照片,隔天早上真正的莫拉雷太太却找上门来要求杰克停止调查莫拉雷。 事情变得越来越迷离,杰克决心追查下去。岂料不久,莫拉雷死在了自家的水池!当地警察认为他死于自杀,机敏的杰克感觉事情越来越不简单。通过调查,他发现当地非常有权势的富翁诺拉(约翰·休斯顿 John Huston 饰)原来早前和莫拉雷共同享有当地水库的支配权,莫拉雷因主张还水于民而和诺拉闹翻了,而莫拉雷竟然是诺拉的女儿!