The documentary explores a father and son who are fighting to upend mainstream orthodontics. John Mew has waged a lonely war against the industry — and that teenage rite of passage, braces, for decades. With his son Mike now taking up the fight, the Mews’ fringe theories have turned into a full-blown online sensation. But even while mewing goes viral on TikTok and the Mews churn out content for their millions of followers, Mike is pursued by the British Orthodontic Society and threatened with expulsion by the very people who took away his father’s license.