Eleven-year-old Jenna, contending with the separation of her parents and the unwanted presence of her twin brother and older sister at Camp Lakeview, is determined to make a name for herself by pulling the ultimate prank.

The girls of Bunk 3C meet in New York City for their six-month Camp Lakeview Reunion.

Separated from her friends by different bunkhouses and activities, and worried that a classmate will reveal that she is a nerd at home, Sarah's second summer at Camp Lakeview gets even worse when an injury and an attentive boy interfere with her reputation as the camp's star athlete.

Having broken her leg practicing for the annual Color Wars competition, Jenna's misery is compounded when she is falsely accused of pulling a series of pranks that could get her sent home, and so, with little to lose, she begins planning her revenge.

When Tori's parents allow her to invite five Lakeview girls on a California ski trip over President's Weekend, she agonizes over how to tell the others they cannot come, then learns that the camp reunion is scheduled for the same weekend.