With a Shakespearean name like Hero, moving towns is never easy. At least this time there's the search for the missing Murphy diamond - rumoured to be somewhere in her new house - to take her mind off things. But that's not the only mystery. How come old Mrs Roth knows so mush about it? and why is Danny, the most popular kid in school, so eager to help? Unless Hero and Danny can find the diamond, a centuries-old mystery will be lost for ever - and with it a modern-day secret that could change all their lives.