There are few cases of Dr. Morelle, the famous criminal investigator, where his secretary Miss Frayle doesn't come to the forefront of the picture. Indeed, eminent friends of the Doctor's have said that Miss Frayle was in some respects the most important part of the Doctor's criminological equipment. It was the murder of her erstwhile employer that had introduced Miss Frayle to the Doctor, and murder was to become a recurring link in their uneasy relationship ...