At the bottom of a sharply descending street - in the topographical sense - in Edinburgh's Georgian New Town, new residents have moved in to number 44 Scotland Street, joining the already well-known and much-loved denizens of that remarkable building. They appear to be a bit of a mystery, but so, too, do other things. What exactly did Sister Maria-Fiore, the aphorism-coining socialite nun, find on the No. 23 bus? Could it be the remains of a hitherto unknown Neanderthal, homo Watsoniensis? On the romantic front, long-suffering Stuart's hopes of kindling a new relationship are dashed, thanks to chino-wearing narcissist Bruce, effortlessly exercising his powers of charm. The Promised Land beckons for Bertie who is off to Glasgow for a school exchange that takes him doon the watter.