Regency Square in Cheltenham is home to some diverse inhabitants. One summer's evening, the square's rivalries and allegiances are disrupted by a sudden and unusual death - an arrow to the head, shot through an open window at no. 6. Unfortunately for the murderer, crime writer Aldous Barnet, staying with his sister at no. 8, had just sent an invitation to his friend Superintendent Meredith to visit him. Three days after his arrival, Meredith finds himself investigating the shocking murder two doors down and finds that six of the square's inhabitants are keen members of the Wellington Archery Club...