A second grade class in Wyoming gets a harmless prompt: draw an imaginary friend. The papers come back and the room goes cold. Every child draws the same figure, down to the tilt of the head and the hollow eye sockets. In two other classrooms, at the same time, the same thing happens. Thirty seven children, no contact between the groups, and one shared name whispered like it has always been there: Yellow Echo.
A school administrator documents the interviews. A university researcher arrives and finds no common trigger, no shared book, no local legend to explain it. Then the evidence begins to vanish. The drawings disappear from a locked cabinet. Research notes vanish from an office. And the teacher who started it all walks out of her life without a trace. The rain keeps falling, and something keeps waiting by the window.
