Eli McCullough's (Pierce Brosnan) will stop at nothing to secure his legacy against the backdrop of the nascent oil industry of 1917.

His tools are deceit, fraud and murder - weapons he wields with the effortless skill of the Comanche warrior he once was. But the biggest challenge he faces will be quelling a civil war under his own roof, triggered by his idealistic son Pete (Henry Garrett). Eli knows the ultimate prize of American dynasty is nearly in his grasp and time is running out.

Meanwhile, in 1851, young Eli (Jacob Lofland) is now married and a respected warrior among the Comanche's, but tragedy forces him into a leadership position as the vast Comanche empire crumbles around him.

Broadening the scope, a 1988 timeline is introduced, bringing the McCullough saga into the more immediate past. Here, at age 85, Eli's granddaughter Jeanne Anne McCullough (Lois Smith) is confronted with a long-buried family secret.