The Peanuts Movie: Snoopy embarks upon his greatest mission as he and his team take to the skies to pursue their arch-nemesis, while his best pal Charlie Brown begins his own epic quest back home. Later, Charlie Brown is partnered with the Little Red-Haired Girl to write a book report. At first, he is excited to have a chance to be with her, but she is called away for a week to deal with a family illness, leaving Charlie Brown to write the report all by himself. Hoping to impress both the Little Red-Haired Girl and his teacher, Charlie Brown writes his report on the collegiate-level novel War and Peace. At the same time, Charlie Brown finds he is the only student to get a perfect score on a standardized test. His friends and the other students congratulate him, and his popularity begins to climb. When he goes to accept a medal at a school assembly, however, he learns the test papers were accidentally mixed up and the perfect score actually belongs to Peppermint Patty. Charlie Brown declines the medal, losing all his new-found popularity. His book report is later destroyed by a Red Baron model plane, and he admits to the Little Red-Haired Girl he has caused them to both fail the assignment.
Before they leave school for the summer, Charlie Brown is surprised when the Little Red-Haired Girl chooses him for a pen pal. Linus convinces Charlie Brown he needs to tell the Little Red-Haired Girl how he feels about her before she leaves for the summer. Racing to her house, he discovers she is about to leave on a bus for summer camp. He tries to chase the bus, but is prevented from reaching it. Just as he is about to give up, Charlie Brown sees a kite fall from the Kite-Eating Tree, and the string becomes entangled around his waist and sails away with him, bringing him up to the bus’s window. Amazed to see Charlie Brown flying a kite, his friends follow