"Mary Calvin sits in her flat for hours, full of fury and sick with despair for the dreadful waste of her friend's young life, Evelyn Torrance. A dreadful resolution begins to dominate her mind: retribution! Fred Tanner must pay for his crime! She takes sleeping tablets from the medicine chest and selecting a sharp ornamental dagger from the mantelshelf, she slips them into her handbag. She puts on her coat, hurries out and heads for Tanner's flat ..."--Publisher's description.