When Tripp Campbell wins a radio contest to meet his favorite band, Iron Weasel, he lands a spot as their new guitar player. Unfortunately, things take an unexpected turn when the band moves into Tripp's house.
The guys compete against a rival band for the chance to play at Izzy's high-school dance by creating painful tests for the other band members to endure.
Derek, Burger and Ash go back to high school to earn their diplomas.
Derek, Burger and Ash must prove to a social worker that they are suitable guardians for Tripp.
The guys try to prove they are still edgy rockers after a magazine article claims they have gone soft. As part of their plan, they create an Iron Weasel cover band called Mini Weasel.
The guys accidentally hypnotize themselves when they try to use hypnosis on their manager so he won't sign a rival band.
Tripp's archaeologist dad visits and must rescue Ash from a thief who wants to exchange him for a priceless artifact.