All four friends want to do something different this weekend. They decide to compromise by attending all four events, but each one makes the other three miserable.
Carver finds Tish's diary which reveals that she and her family are planning on moving out of the country, which causes the rest of the gang to panic and plan what they think will be Tish's ideal final weekend with her friends.
Candace, a film student at a local college, wants to make a homemade movie about the four of them. They think that they're too boring to be in a movie, and decide to start acting like their favorite TV characters.
The gang attends a seminar given by a child prodigy and afterwards, everyone feels compelled to spend their weekends working towards various goals as opposed to relaxing and having fun.
After Tino is wrong about finding a "private mountain", he goes on a mission to find "The Crevasse", a spot in the nearby hills that they used to hang out in.
The gang starts to use Tish's name as a verb for when someone offers an overly intellectual or wordy explanation or observation. It's harmless until it begins to catch on, much to Tish's chagrin.
Bree and Colby decide that one of them must be cooler than the other, leading to a cool showdown. After Bree loses, the gang tries to help her adjust to life as an average kid.
A popular girl named Pru starts hanging out with the gang, and although they recognize that she is using them to make her real friends jealous, they believe it's worthwhile to let her in order to take advantage of the perks being friends with a popular kid offers them.
Tino's plans to go see Chum Bukkit: The Movie with his friends are thwarted when he learns that his boring cousin Phillip is coming to stay with him for the weekend.
Tino worries that he will eventually drift apart from his friends the way that his mom did from her childhood friend, and so each member of the gang spends the weekend seeking out new friends with whom they have more in common.