The Heffley family attends a pool party at the community pool, where the family meets Lenwood Heath, a former trouble-making friend of Rodrick who is now a model student after attending a prep school known as Spag Union. Greg's father Frank thinks about enrolling Greg there. Greg's summer vacation starts off badly: Frank bans video games in anger at Greg's laziness, and his mother Susan starts a book club for all the boys in the neighborhood, but she does not see their books as real literature causing the boys to never come back the next day. Frank is also getting jealous of the neighbor's athletic kids, and after his video game ban, Susan forces Frank and Greg to bond with each other: their bonding activities end in disaster.

After their high school basketball coach passes away, five good friends and former teammates reunite for a Fourth of July holiday weekend.

When the manic Dr. Robotnik returns to Earth with a new ally, Knuckles the Echidna, Sonic and his new friend Tails is all that stands in their way.

After her mother goes missing, a young woman tries to find her from home, using tools available to her online.