When Richard gives Larry’s hairdresser a bad review for saying he’s bald, he gets offered a free haircut. This inspires Gumball and Darwin to go on a reviewing spree across town, forcing Larry to give them stuff with the threat of a bad review. But, just because the customer is always right doesn’t mean that what they’re doing isn’t wrong.
Gumball, Darwin and Anais discover that Mr. Wilson has been picking on Richard for most of his life; ever since he humiliated Richard with a high school prank. The kids try to work their dad through it, but when their efforts fail they realize that getting back at Mr. Wilson is the only way to break the cycle.