The story depicts the effect of confinement on the narrator's mental health and her descent into psychosis. With nothing to stimulate her, she becomes obsessed by the pattern and color of the wallpaper. "It is the strangest yellow, that wall-paper! It makes me think of all the yellow things I ever saw – not beautiful ones like buttercups, but old foul, bad yellow things. But there is something else about that paper – the smell! ... The only thing I can think of that it is like is the color of the paper! A yellow smell."
