Snoopy breaks his foot and must wear a cast, which proves complicated when he has to play for Peppermint Patty's baseball team. Meanwhile, Woodstock grows a beanstalk to the sky, where he and Snoopy meet a cookie-hoarding giant. Finally, the youngest of the Van Pelts has to deal with various problems.
Snoopy drives the gang to a computer camp. Once they explore the world of computers and Snoopy plays with a robot. Linus starts a clinic for kids that have security blankets. Snoopy goes to visit Spike in the desert taking Linus' blanket with him. Charlie Brown and Peppermint Patty go on a date. Later Marcie and Peppermint Patty both develop a crush on Charlie Brown.
Peppermint Patty's struggles in school are chronicled. Snoopy's develops a cool trick after his antics begin to wear on the kids' nerves. Schroeder doesn't know how to get to piano camp. The gang flys him there on Snoopy's doghouse.