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Blondie McClune lives with her parents and her sister Gertie's family in a tenement house in New York.  Some time after her girl friend, Lottie Callahan, leaves and moves uptown to a posh neighborhood to join the Follies, Lottie visits her mother on Mother's Day and brings Blondie back to her apartment, where she meets Larry Belmont.  He arranges for her to go to dinner with oil tycoon Murchenson, which angers Lottie, who has changed her name to Lurlene Cavanaugh.  Blondie leaves, but Larry brings her back and promises to take her to the Follies to see Lottie perform that night.

While they watch the show, Larry gets her a job in the chorus, further angering Lottie, who is becoming jealous of her friend.  After a night at a speakeasy, Larry carries a drunken Blondie home, shocking her father, who misinterprets their evening, tells Larry to get out and warns Blondie never to see him again.  Angered, she leaves, despite her father's attempts to get her back.  She then goes to Lottie's and learns that Lottie really loves Larry.

The next morning, Pa goes to Lottie's to apologize to Blondie for being "an old time father" and sadly gives his blessing to her going into the Follies and starting a new life.  After promising Lottie that she won't go after Larry, Blondie goes with her to Murchenson's yacht.  Larry admonishes Lottie for trying to bring a nice kid like Blondie into her type of life, then breaks off with her.  Speaking with Blondie, Larry tells her she is too nice a kid to be in this crowd.  He leaves after Lottie interrupts them, then the girls fall into the water in a fight and Blondie leaves, promising to find another man.

Three months later, Blondie has her own swank apartment and is a Follies hit.  She invites both Larry and Lottie to her place and tries to get them to reconcile, but Larry only wants to be friends with her.  Lottie and Blondie decide to make up, though, and Blondie throws a party, during which she receives word that her father has had a fall at work.  When she goes to him, she learns that his heart caused the accident, which leads to his death.

Some time later, while Blondie is performing, Larry sends word to meet him at a speakeasy, but Lottie goes instead of telling Blondie.  When Blondie does hear about it, she goes to him and learns that he is leaving for Europe because he is in love with her.

Returning to the show with Lottie, Blondie is thrown from the stage during a whip routine when Lottie lets go of her hand.  Remorseful, Lottie goes with her to the hospital.  When Blondie is released from the hospital, she decides to go home because of her injuries, and sends Larry away, refusing help from him or his friends.  Soon Larry and some gentlemen visit Blondie.  Confused, she discovers that they are bone specialists whom he has brought to cure her and that Larry is going to marry her.