Are there two kinds of men in the world? Or are men all alike? This girl made up her mind to find out.

When Charles Hale is visiting his mistress, Sybil Russell, he is shot in the arm by Sybil's estranged and outraged husband. Hale's daughter, Marjorie, is so shocked to discover in this abrupt fashion her father's philandering that she leaves her wealthy home and goes to the slums to do settlement work. Marjorie, who is engaged to the district attorney, is there placed in a compromising position by her father's assailant, who intends to revenge himself upon the entire Hale family.