The Selfish Woman.

A young engineer, Tom Morley, is building a railroad through Imperial Valley. Tom's father also wants the job, and tries to persuade his son to give up the work, but Tom refuses. Tom falls for a society girl named Alice Hale, who marries him to bring prestige to her family. Initially, Alice plots against Tom, but Tom wins her over and they work together to defeat those who are plotting to destroy Tom's work.