Chapter Five is all about the mole monsters, and the band has to figure out a way to get rid of them. They've got a plan: they're going to throw a free rock concert at a local sports stadium. The band is psyched to be able to do this, but they have to return the costumes to the costume store because the kids there are "not true musicians" . They can't just throw the concert away, though, because they'll have to clean up after it. They also have to find some way to make sure that the mole creatures don't have access to all the latest and greatest technology.