To the casual observer, the great enlightened 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. And soon enough Irene Pollock is shocked to learn that her small son Bertie harbours a highly unsuitable ambition; the gloriously vain Bruce discovers a wrinkle and confronts rejection; and Angus finds himself facing the grave consequences of unbridled bliss, not to mention a large Glaswegian gangster bearing gifts ...