The celebrated explorer Ramon Vegas had been given the nickname 'Caramuru'--Man of Fire--by the Brazilian natives, and that, said Tina Donnelly's botanist aunt, was exactly what legend had him to be--a truly volcanic personality. 'I'm absolutely thrilled at the idea of joining him on his latest expedition up the Amazon, ' declared Aunt Chris. But it was not to be. At the last moment Aunt Chris had an accident and could not go--so Tina took her place. After all, they were both botanists, even their names were the same, so why shouldn't Tina just pretend to be her aunt? She should have known, even before she met him, that Senor Vegas was not the man to appreciate having that kind of deception practised on him; but by the time she had met him--and immediately fallen in love with him--it was too late.