Raylan Reeve, an ostentatious American opens a golf course and during the inaugural competition The Flower of the Fairway for women and Bunty taking part, as her father had cut her allowance, finds a body in the reeds. Inspector Mallory allows the contest to continue when a gunshot is heard and Reeve is found shot dead in his study. Mallory arrests neighbour Hermione Harvey who had a revolver and hated Reeve. Father Brown investigates the family; father, daughter, and granddaughter and uncovers a dark family secret.