In the 1920s, the richest people per capita in the world were members of the Osage Nation in Oklahoma. After oil was discovered beneath their land, the Osage rode in chauffeured automobiles, built mansions, and sent their children to study in Europe.

Then, one by one, the Osage began to be killed off. The family of an Osage woman, Mollie Burkhart, became a prime target. One of her relatives was shot. Another was poisoned. And it was just the beginning, as more and more Osage were dying under mysterious circumstances, and many of those who dared to investigate the killings were themselves murdered.

As the death toll rose, the newly created FBI took up the case, and the young director, J. Edgar Hoover, turned to a former Texas Ranger named Tom White to try to unravel the mystery.

White put together an undercover team, including a Native American agent who infiltrated the region, and together with the Osage began to expose one of the most chilling conspiracies in American history.


1920 年代，世界上的富豪都是奧克拉荷馬州奧色治國的成員。奧色治成員在自己的土地下發現石油後，他們搭車有專屬司機、興建豪宅並且送小孩去歐洲讀書。

後來奧色治成員一個接著一個開始被謀殺。奧色治成員之一，茉莉．布克哈特女士一家人變成首要目標。她的一位親戚被射殺，另一位遭毒殺。越來越多的奧色治成員死得蹊蹺，還有許多敢於調查謀殺事件的人遭到謀殺，但一切不過是個開始。

隨著死亡人數攀升，新成立的聯邦調查局承接本案，年輕的局長約翰．埃德加．胡佛向前德克薩斯州騎警湯姆．懷特求助，設法解開謎團。

懷特組織一個祕密團隊，裡面有一位滲透到奧色治地區的美國原住民特務，與奧色治成員一起揭露美國歷史上最令人不寒而慄的陰謀。