As Nikki plans how she's going to spend her summer, things get more complicated after she starts hanging out with a visiting student.

Springtime brings crazy adventures to Nikki and her friends Chloe, Zoey, and Brandon.

Middle-schooler Greg Heffley nimbly sidesteps his father's attempts to change Greg's wimpy ways until his father threatens to send him to military school.

Supremely confident middle-school student Nate Wright manages to make getting detention from every one of his teachers in the same day seem like an achievement.

Both Nate Wright and school bully Randy Betancourt have crushes on the new girl Ruby, and altercations between the two boys result in peer counseling sessions that eventually lead to an unlikely friendship and their becoming teammates on the school's ultimate frisbee Mud Bowl team.

Greg Heffley tells about his summer vacation and his attempts to steer clear of trouble when he returns to middle school and tries to keep his older brother Rodrick from telling everyone about Greg's most humiliating experience of the summer.

Middle-schooler Nate Wright vies against his rival, the "perfect" Artur, to win the grand prize of a customized skateboard in their scout troop contest.

Jamie Grimm is a middle schooler on a mission: he wants to become the world's greatest standup comedian, even if he doesn't have a lot to laugh about these days. He's new in town and stuck living with his aunt, uncle, and their evil son Stevie, a bully who doesn't let Jamie's wheelchair stop him from giving Jamie a good pounding every once in awhile.

Nikki Maxwell is determined to help out her crush Brandon save an animal shelter. So Nikki and her friends Chloe and Zoey enter an ice skating competition to help raise money for the shelter, but (big surprise) Mackenzie has to stick her nose in and cause trouble.

When the popular girls club takes interest in Mia, she has to decide between being popular and her new cupcake club friends.