In November, Johnsy becomes ill with pneumonia. Her illness lingers. She becomes frail and loses hope of recovering. Outside her window is an old ivy vine on which only a few leaves remain. Johnsy has become so frustated and convinces herself if the last leaf fell he would be die.
The doctor tells Sue that if Johnsy is to get well, she must happy. Sue is worried; she goes downstairs and reveals her fears to Mr. Behrman, a grizzled, unsuccessful artist who dreams of one day painting a masterpiece. Only one leaf remains on the vine now, and Mr.Behrman worried if the last leaf will be fall.
The next morning, when Sue and Johnsy look out the window, the last leaf is still there. Johnsy thinks about her situation and convinces herself if the last leaf still in there he would not die. With this change in attitude, Johnsy gradually gets well. The doctor comes and verifies Johnsy's recovery. The doctor also tells Sue that Mr. Behrman has pneumonia. He dies that same day.
Later that day, Sue discovers how Mr. Behrman became ill. She tells Johnsy that on the rainy night when the last leaf was about to fall, Mr. Behrman took a ladder, climbed the wall, and painted a true masterpiece a picture of the last leaf on the brick wall.So the last leaf stil on the wall and never to fall.