Identical twins Elizabeth and Jessica Wakefield can't wait until Eva, the new girl in their second-grade class, arrives from Jamaica. When Elizabeth is picked to show Eva around school, the two become friends, and Jessica begins to feel left out. After all, she and Elizabeth are supposed to be best friends.

To get back at her twin, Jessica ignores Elizabeth and pretends to keep secrets from her. She even pretends she has a new best friend. Elizabeth can't understand why Jessica is being so mean. Everything's a mess, and it's up to Eva to help Elizabeth and Jessica become friends again!