He gets a message on the psychic paper, no idea who from. It just reads ‘The library, come as soon as you can.’ There’s a kiss at the end. It’s a mystery, and the Doctor never could resist one of those, so instead of the promised beach, he drags Donna to the biggest library the universe has ever known. It takes up the whole planet.
The place appears deserted, and yet a scan reveals millions upon millions of life forms.
That’s not good.
They came here because of a message, but what’s in the shadows might cost them their lives.