A man out for his morning stroll finds the frozen body of an elegantly dressed woman seated on a grassy canal bank. Bruise marks on the woman's neck suggest foul play. She has no handbag, but a two-year-old utility bill carefully tucked in her shoe may provide a clue to her killer. When Det. Chief Insp. George Hennessey and Det. Sgt. Somerled Yellich investigate, they discover that the victim had worked as a companion to a number of elderly men. In each case, she'd used a different name, worn a wig, and departed with her charge's valuables. Reports of a strange Canadian gentleman in the area add to the mystery. Yellich and a detective constable travel to Ontario in search of answers.