Young factory worker Kathleen O'Donnell, falls in love with Harry Stanton, an ambulance driver who convinces her that he is a struggling medical student. She leaves home when her father, who knows something of Stanton's character, forbids her to invite him to the house. She takes up residence in a boarding-house and gives Harry her spare wages to buy schoolbooks. Donald Holliday, the factory owner, realizing her folly and being in love with her himself, tries to warn her about Harry, but she resents his interference and goes to work in a restaurant where she is completely disillusioned when Harry brings another girl to dinner. As a result she falls ill, and during her convalescence she finds a worthy affection in Holliday.