Elena Weaver was a surprise to anyone meeting her for the first time. In her clingy dresses and dangling earrings she exuded a sexuality at odds with the innocence projected by the unicorn posters on her walls. While her embittered mother fretted about her welfare from her home in London, in Cambridge--where Elena was a student at St. Stephen's College--her father and his second wife each had their own very different image of the girl. As for Elena,...