Clara Millen's life is falling apart: her dream job has become a nightmare, she's single, and she hasn't taken a break in years. Fortunately, she can solve the last problem by joining her friends on their annual summer vacation to their cherished childhood sleepover camp for a much-needed getaway.
However, upon arriving at Pine Lake Camp, Clara is met with another unwelcome change: the owners are retiring and selling the property. This news shifts her plans for fun into a night of reminiscing and leads to an unexpected heart-to-heart with Mack, her old camp nemesis and constant rival, who remains just as irritating (and annoyingly handsome) as ever.