Randy and Gerald attempt to have dinner at Vernacular. They are told they must wait a half hour before they can be seated, but they are seated right away when Gerald reveals that he is a Yelper. Meanwhile, Cartman seems content to abuse his newfound power as a Yelp reviewer, demanding a Mexican restaurant to give him free dessert for the possibility of a five-star review. At the same time, two random South Park citizens, who also happen to be Yelpers, enter the restaurant and demand special treatment as well. Cartman instantly shows his disdain for them, thinking only he deserves to be a restaurant critic.
The next day, he abuses his Yelp power to threaten David to make his already-low rating of his father's restaurant even lower. Gerald is also taking his new position as a Yelper very seriously. He writes a fifty-page review of Applebee's, lauding it with strong, poetic flattery but giving it a bad review at the very end of his critique over an exceedingly pathetic, shallow, and irrelevant reason. Even Sergeant Yates is going overboard with his Yelp reviews. At Whistlin' Willy's, Willy has a meltdown over the numerous Yelpers South Park has bred and kicks them out of his restaurant as a result.
This starts a chain reaction in South Park, as nearly every restaurant in town bans Yelpers and other food bloggers. The Yelpers are angry at this news. They then proceed to attack anybody and destroy any place that does not treat them like vengeful deities. Later on, an entire mob of Yelpers gives their own "noble" speeches about their position as South Park's best food reviewer. All of them so ridiculously self-absorbed they had no idea that the others were talking at the same time. Cartman contacts many Yelpers he considers a wannabe in order to show them "how it's done." However, the number of Yelpers that show up for this meeting far exceed Cartman's expectations, as they take up the whole surrounding block of his house. Cartman rallies them up by stating that they need a clear leader.
After Kyle realizes that all the Yelpers think they're the leader, he devises a plan with Mayor McDaniels. One by one, the Yelpers are knighted as the "best food critic in South Park," and are given golden badges to distinguish them. South Park restaurants once again allow them," but take up a habit of tainting their food.