Felix's job is to help guard the wall that protects everyone from the horrible monsters on the other side. But it's a boring job--nothing ever happens at the wall, so he spends his time dreaming of playing his keytar in a band. One day, Felix hears music coming from the other side of the wall, and sets out to investigate. What he discovers will knock some sense into him and show him and the other guards a better way to deal with the unknown. Let the music begin!