Animals always come first for Mandy Hope, and at Animal Ark - her parents' busy veterinary surgery - Mandy is always making new friends.
When Mandy asks Rachel Farmer to look after a neighbour's guinea-pig, she's thrilled! If her parents see how good she is with it, maybe they'll let her have one of her own. But then Rachel loses one of the guinea-pig's babies - now she'll never be allowed to have a pet! Can Mandy and James help her find the missing animal?
