It's a dirty, folded rectangle, about twelve inches by six inches, and it inspires greed and murder on both sides of the Atlantic. What is it? And who will die before it finds its rightful owner? Sadly for architectural photographer Harriet Jeffries, one of the murder victims ends up dead in the middle of her living room floor. Sadder still, Harriet's special friend, Inspector John Sanders of the Toronto police, becomes the chief suspect. The case of the missing document begins with the unwelcome arrival of Harriet's ex-lover, prosperous artist Guy Beaumont.