"She opened the lid. The inside of the box was divided into two halves, and each half contained cards. On the left hand side were red cards with yellow lettering on them, which said 'Help'; and on the right hand side were blue cards with red lettering on them, which said 'Clue'..."
Just what has happened to Dora's dad, exactly what is the present he left for her, and who is that strange boy who keeps appearing and disappearing so mysteriously? The second of 12 chapters.