Mandy Hope's parents own Animal Ark, a well-known veterinarian's office, so she is born with a natural love of animals. Mandy's friend, Laura Baker, invites her over to see her pet bunny, Nibbles. All goes well till Laura's cousin, Tim, lets the bunny out to play with, allowing it to eat buttercups and grass.
After Mandy returns home, later that night, her parents get a call about the bunny being sick. Turns out that buttercups are very poisonous to bunnies. Luckily, with lots of love from Mandy, Laura, and Tim, and some meds from Mandy's parents at Animal Ark, Nibbles gets better, and is able to return quickly back home to Laura.