Devastated by the end of her relationship, our heroine swaps her catsuit for pyjamas and hides away from the world. But her friends from the nightclub refuse to let her waste away in self-pity and drag her out to make up the numbers for a party. Only full make-up will suffice, and there's serious grooming to be done before our girl's up to the challenge - her state of misery has left her so thin that even her favourite Audrey Hepburn number doesn't cling the way it should.
At the soirée, she becomes entranced with a powerful married man, but it's unlikely their paths will cross again. Until a body is found in the street, stabbed to death - the victim, a gigolo, has connections to the object of her affection. And it seems that the gigolo lifestyle can leave one, ahem, exposed to hidden dangers. Our girl valiantly agrees to take on the case - any meetings with her beloved are an incidental added bonus.