While hot on the heels of serial coupon-racketeer Gordon Ginner, Chief Inspector MacDonald of Scotland Yard receives word of an intriguing incident up in Lancashire - the summer cottage of local farmer Giles Hoggett has been broken into. What first appears to Insp. MacDonald as a simple break-in quickly spirals into mystery of contested land grabs for fishing between farmers, made all the more enticing to MacDonald when a body is then found in the river - the body of Gordon Ginner. The very picture of a cosy crime mystery.