Write a summary of The Last Leaf written by O Henry.

 "The Last Leaf" by O. Henry is a poignant short story about hope, sacrifice, and the power of art. Set in Greenwich Village, the story revolves around two young women, Johnsy and Sue, who are aspiring artists sharing an apartment. When Johnsy falls gravely ill with pneumonia, her spirits plummet, and she becomes convinced that she will die when the last leaf on a vine outside their window falls.

Sue, deeply worried for her friend's health, seeks help from their neighbor, an elderly artist named Behrman. Behrman is a curmudgeonly but kind-hearted man who has always dreamed of painting a masterpiece.

One night, during a fierce storm, the last leaf on the vine miraculously stays intact. This steadfast leaf gives Johnsy renewed hope, and her condition begins to improve. However, the truth emerges: Behrman had painted the leaf on the wall during the storm to give Johnsy the will to live. Tragically, Behrman catches pneumonia himself from his exposure and dies shortly after, but not before creating his masterpiece—the painted leaf that saved Johnsy.

The story highlights themes of selflessness, the healing power of hope, and the idea that true art can touch and transform lives.