When sixty-nine-year-old spinster Arabella Pettygrew plunges from the roof of her apartment in Balmoral Square Mansions, there are three possibilities: a tragic accident, suicide, or murder. Cycling Detective Inspector Richard Strawberry and Constable Brenda Gunn are assigned to the case, but as their investigations unfold, the mystery deepens. Is there a connection between the pensioner s death and the undercover surveillance being conducted by police in the Square s private gardens? If Arabella is the victim of foul play, the list of suspects is long, including a gallimaufry of eccentric neighbours hiding dark secrets behind their twitching net curtains. Meanwhile, the Seagull Slayer a self-appointed crusader on a mission to rid Edinburgh s streets of the flying rats harbours a murderous hatred for First Minister Nicola Sturgeon which complicates matters even further for Strawberry and Gunn.