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.

During the last weeks of summer camp, eleven-year-old Alex Kim has trouble hiding a secret from the other girls in bunk 3C while also trying to meet the high standards she sets for herself in sports, relationships, and other activities.

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.

Having left summer camp to return home, the girls from bunk 3C use a blog to keep one another informed of their struggles adjusting to sixth grade at their respective schools and to new situations at home.