Sami was still holding the goldfish. 'Swishy little fishy,' she whispered, over and over. Frankie stared at her with his big, bulging, glowing eyes. Suddenly a little light bulb went on . . . Frankie was a Big Fat Zombie Goldfish and somehow he'd hypnotized my best friend's sister!' Tom's big brother is an Evil Scientist who wants to experiment on Tom's new goldfish, Frankie. Can Tom save his fish from being dunked in radioactive gunge? Er, no. In an act of desperation Tom zaps Frankie with a battery, bringing him back to life! But there's something weird about the new Frankie - he's now a zombie goldfish with hypnotic powers, and he wants revenge . . . Tom has a difficult choice to make - save his evil brother, or save his fishy friend?