Mordecai and Rigby must find a way to cover up a hole in the wall they created, and a magical keyboard they name 'The Power' might be just the thing for it.
A birthday party is scheduled in the park, and everyone has interesting jobs to do. That is, everybody but Mordecai and Rigby, who are only trusted with the lame job of setting up the chairs. In order to prove they are not slackers, the duo agree to set them up without being distracted.
Mordecai and Rigby need money in order to see their favourite childhood band. They decide to take on extra shifts, but soon start to tire out so they turn to coffee in order to stay awake.
Rigby and Mordecai are up to their normal shenanigans when they are asked to tend to the garden. They are handed shovels and they pretend sword fight and Mordecai hits Rigby in the head and he thinks he killed Rigby. He needs to now find a very hidden place to hide Rigby's body before anyone else finds out.
When Rigby digs up a good-looking plate from the garbage, he and Mordecai decide to use it by eating a piece of chocolate cake on it. As their efforts prove fruitless, they decide the only way forward is to convince the solitary Skips to have a birthday party.
The annual park barbecue has arrived, and Benson is so excited he has ordered premium hot dogs. When things go wrong, Mordecai blames Rigby for always making things worse, despite his claims that he can 'totally fix it'.
Mordecai and Rigby need to buy a grilled cheese sandwich for Benson, but can't be bothered to wait in line. Instead, they pretend to be astronauts, which results in them trying to out lie each other.
In an effort to woo Margaret, Mordecai starts using a cologne that can supposedly attract women, called "Dude Time". Unfortunately, all it seems to attract are unicorns.
Mordecai and Rigby's constant prank calls result in one of their victims sending them back in time to the eighties.
When the park is going to be audited, the guys must find a way to sort their taxes out or face it being closed down. Mordecai suggests Rigby's accountant brother, Don, but Rigby must first get over a long running feud.
After gorging on snacks at the snack bar, Rigby suffers an unfortunate accident as his consciousness separates from his body.
After ordering a bunch of shirts for a fake band, Mordecai and Rigby find themselves having to learn to play for real to avoid looking like idiots at the local open mic night.