When the wrong man is arrested for pickpocketing Springfield during the San Castellaneta street festival, Chief Wiggum sets out to catch the real criminal.
Homer is demoted to supervising interns, among whom is go-getter millennial Mike, a 35-year-old who asks Homer to be his mentor. However, when Homer inspires Mike to start a business of his own, the two find themselves being chased by the mob.
When a video goes viral of Bart and Homer fighting, they begin a journey as social media celebrities. Meanwhile, Lisa battles the school’s new industrialized detention system.