William Sydney Porter, better known by his pen name O. Henry, was an American short story writer known for his surprise endings. The story "The Last Leaf" is set in Greenwich Village during a pneumonia epidemic. It centers on artists Sue and Johnsy who share a studio. Johnsy becomes ill with pneumonia and believes she will die once the last leaf falls from a vine outside her window. Their elderly neighbor Mr. Behrman also falls ill. He creates a masterpiece painting for Johnsy before ultimately passing away, with the last leaf still on the vine, allowing Johnsy to recover.