Out of the blue each of the characters receives an odd letter from a woman called Vivienne McBride.
The letter is pretty light on details but it seems to be an invitation to a job interview of some sort in London in exactly two weeks time.
Something about the letter is strangely compelling. Screw it up and throw it in the rubbish and an hour later you’ll be smoothing it out to read it again. Decide to shred it and you’ll just not quite get round to it.
Is it the mystery that seems so attractive? Or perhaps just the chance to get away for a day or two? Whatever the reason, the characters makes arrangements for a little trip…