When Rev hears a snowstorm is coming, he starts building the best winter track ever! One problem...Rev is sick. No matter what his friends say, they can't keep him away. Eventually he'll need to admit the best way for him to help is to go home and rest.

At band practice, Rumble struggles to control his nervous backfiring, even damaging the instruments by accident! Determined not to give up on the festival, the gang improvises and uses makeshift instruments.