The valet parking attendant Raphael hands Homer the keys to the wrong car, a fancy 1957 seafoam Cadillac Eldorado Biarritz convertible.
When they go back to the restaurant, Comic Book Guy accuses them of stealing his father's car, and when he notices his mint condition copy of Radioactive Man #1 was damaged, he presses charges and Homer is arrested.
With two weeks before Homer's sentencing hearing, Marge goes to The Android's Dungeon & Baseball Card Shop to negotiate with Comic Book Guy, who says the issue is about getting respect.
At home, Lisa discovers sentencing mitigation videos, including one employed by Mr. Burns for one of his crimes against Springfield, portraying him in a more sympathetic light as a product of a neglected and bullied childhood.
The family's efforts to produce a mitigation video for Homer fall short but Lisa is able to splice together the work using her Final Cut Pro skills.
[1] Del Toro previously directed the opening sequence of the twenty-fifth season episode "Treehouse of Horror XXIV.
Club gave the episode a C+, stating "For Homer to finally understand the pain his wacky weekly nonsense causes to another person could be a loaded moment, dramatically.