Valentine's Day is fast approaching. While all the kids of Makawee Elementary are busy creating their Valentine's Day mailboxes for the annual Best Mailbox contest, Ginni and Frankie get caught up in a bigger issue.

Georgina, the owner of Sweet Georgina's Chocolate Shoppe, is no longer sweet. In fact, she's quite mean to everyone who comes into her shop. What could possibly be going on that would turn one of Makawee's sweetest citizens into a grump?

To make matters worse, what is that mysterious whirring noise that continually follows Ginni wherever she goes? And if this wasn't unnerving enough, what about the spooky lights she sees in her backyard?

Can Mr. Whiskers, Tyto, and Neelia help Ginni and Frankie get to the bottom of all these strange happenings?

And will Georgina ever be her sweet self again?