Little Linh is the cleverest little witch on Mãi Mãi island. She has everything she could need: a trusty broomstick, a powerful spell book, and a magical pet mouse. She also has a new brother named Baby Phu, and she does not like him one bit. He crashes her broomstick, eats pages out of her spell book, and keeps her up all night. Little Linh tried giving Baby Phu away, but nobody will take him, not even the Orphanage for Lost and Magical Creatures.

So, she'll just have to try something else...like turning him into a goldfish. The only problem is, Baby Phu ate the second half of the spell. Still, there's a reason Little Linh is the cleverest little witch. She can guess the second half of the spell...but it might take a few tries.