The episode, written and storyboarded by Joe Johnston and Jeff Liu, is a non-canon crossover with Uncle Grandpa, another Cartoon Network series.

In the episode, Uncle Grandpa tries to help Steven master his shield ability, causing many nonsensical events along the way and making Garnet, Amethyst, and Pearl see him as a threat.

When Steven (Zach Callison) is frustrated that he is unable to summon his mother's shield, Uncle Grandpa (Pete Browngardt) comes out from an ocean portal to help.

When Garnet (Estelle), Amethyst (Michaela Dietz), and Pearl (Deedee Magno Hall) see what is going on, they come to attack Uncle Grandpa, but Steven stops them.

In his RV, Uncle Grandpa introduces Steven to his friends Pizza Steve (Adam DeVine), Mr. Gus (Kevin Michael Richardson) and Giant Realistic Flying Tiger.

The Gems all apologize, and Uncle Grandpa leaves on Giant Realistic Flying Tiger, reminding the viewer to "stay weird" and checking Steven off a list of other Cartoon Network protagonists, some of whom appear when Steven and the Gems reunite with Uncle Grandpa in the short The Grampies: Dexter and Dee Dee from Dexter's Laboratory, the Powerpuff Girls from the series of the same name, the Eds from Ed, Edd n Eddy, Billy and Mandy from The Grim Adventures of Billy & Mandy, Mac from Foster's Home for Imaginary Friends, Juniper Lee from The Life and Times of Juniper Lee, the SWAT Kats from SWAT Kats: The Radical Squadron, Flapjack from The Marvelous Misadventures of Flapjack, Finn from Adventure Time, and Clarence from the series of the same name.

[3] Joe Johnston and Jeff Liu wrote the episode, which guest stars actors Pete Browngardt, Kevin Michael Richardson and Adam DeVine reprising their respective roles in Uncle Grandpa.

Club, Eric Thurm wrote that its announcement caused confusion among fans, "not least because the deeply surreal and ridiculously over-the-top Uncle Grandpa is much weirder than Steven Universe".