Wings of Pride (1920)

In New York City, haughty society girl Olive Muir is engaged to a man named Dick. Olive objects when Alice Prentice, a girl of lower station, comes to visit her family. After Alice's drunken father visits the Muir home, Olive is horrified to learn that she was adopted and that Mr. Prentice is her real father. Humbled, Olive leaves for the West to see her newfound mother, who is ill, and stay with the Prentices. There she becomes involved in a political battle between Kavanaugh, a political boss who desires Olive and controls her father, and Kent Ordway, a district attorney who befriends Olive. Getting wind of a plan to kill Ordway, Olive convinces her father to warn the young man; a huge fight breaks out in Ordway's house, in which Kavanaugh kills Prentice. Back in the Muir home, Olive learns that Dick, her fiancé, and Alice have fallen in love. Olive clears the way for their union, then tells Ordway that she loves him.