Duncan and his son, Jack, plan a reception and entertainment for the Barton party calculated to measure up with an Easterner’s ideas of the wild and woolly West.

When Betty arrives with her aunt Cythia Straight and Lem Dawson, who aspires to marry her, they are met by a stage coach and a retinue of cowboys.

The trip to the ranch is interrupted by an Indian attack, planned by the Duncans, which frightens the Aunt and Percival but delights Betty.

During a masqued ball given at the Duncan Ranch for the Bartons, Jack plans to arrive as a bandit and kidnap Betty.

A print of Thunder Riders is listed as being held in the collection of La Cineteca Del Friuli.