The Dukes are on the road when a pesky fly invades their van. Arj's determination to rid the van of the fly leads to a battle of epic proportions.
Arj swallows a microphone stand transforming him into Arj-o-phone - part Duke, all microphone. His auto-tune abilities attract the attention of the Dukes' rivals the Lukes of Flökstônia who switch him with a fake.
Larj's stench is at an all-time high. Arj and Barj attempt to wash Larj but his stinky underpants come alive refusing to be washed. When the grotty guitarist Larj and his undies start a bromance, Arj and Barj must stage an intervention.
Arj and Larj have to rescue Barj after he's sucked inside a mysterious 1980's arcade game right before a gig.
After Barj is injured during a video shoot, he's given an experimental robot exoskeleton and turns crime fighter.
Barj is mistaken for a wild west villain and thrown into jail by his band buddies for a reward.