When Grandma hosts a Sock Hop party, Polly is beyond excited to give Richard his gift – a pair of socks! However, when his present gets delayed in the mail, Polly is too impatient to wait and tracks down the package with her friends.

Polly and friends can't wait to perform their version of a popular dance challenge at the school dance! But on the big night, when someone (or something) tries to sabotage the event, Polly goes tiny to save the school dance.