To the casual observer, the city of Edinburgh, home of no-nonsense philosophers and cream teas, might appear immune to the rollercoaster of strong emotions. But at 44 Scotland Street, as Matthew and Elspeth embark on the risky enterprise of married love, the raffish portrait painter Angus Lordie has a premonition of disaster.

It's not that poor Bertie Pollock is wishing his life away, but having anticipated his 7th birthday for so long he's now longing to be 18. But there's a lot of living to do and Bertie isn't alone amongst the residents of Scotland Street in trying to do just that - with mixed fortunes.