When Mark accidentally turns his best friend's goldfish into a mermaid, neither teenager knows what to do. The creature isn't supposed to exist! The poor little goldfish doesn't know what to do either, and she doesn't trust the giant beings who walk around outside her glass home. The only being she trusts is Chaos--the lazy cat who often watches her as she swims. But life isn't easy for a tiny mermaid--especially a mermaid who's in love with a cat. And Mark could get into serious trouble if the professors at the Academy find out he's been using his powers in the outside world...