The friends attend a science-based summer camp on an island, where they make some incorrect assumptions about an aloof fellow camper named Kate.

When Andrea's Aunt Susan must attend to a family emergency, the girls volunteer to take over management of the luxurious Heartlake Grand Hotel.

It's Stephanie vs. Tanya for Heartlake High Class President. But when Tanya resorts to dirty tricks, Stephanie decides to give her a taste of her own medicine.