The renowned family Callander receives a very unwelcome visit from their Australian relative, nephew Brian Pallard of family patriarch Peter Callander. Unwelcome because Pallard cultivates a rather dubious way of life and made his considerable fortune on the races. Upon arrival, Pallard proves charming and witty, so that daughter Gladys immediately gets a crush on him, but he also has rivals who do not shy away from bad deed like killing a horse with tse tse flies to manipulate a horse-race... Entertaining mix of social comedy, melodrama and lightweight detective novel by Edgar Wallace who was a prolific author of crime, adventure and humorous stories.