Disillusioned by his perpetual categorization as a troublemaker, rebellious rabbit Peter suffers an
existential crisis in the English countryside. Despite his upcoming marriage to Bea—now a successful, published children’s book author—and his newfound domestic stability with his human
surrogate father Thomas McGregor, Peter feels suffocated by publisher Nigel Basil-Jones’s attempts to rebrand him and his mischievous family as villains in upcoming literary sequels. Seeking validation and desperate to shed his bad-boy reputation, Peter impulsively flees the idyllic farm and ventures into the bustling, gritty streets of Gloucester.Upon arriving in the city, the cynical rabbit encounters a seasoned, street-smart con-artist bunny named Barnabas, an old acquaintance of Peter’s late father. Craving approval and eager to prove his worth, Peter quickly falls under Barnabas's charismatic spell. Barnabas introduces Peter to an eclectic underground crew of hardened urban animal criminals, including a sassy rat named Samuel Whiskers and a ferocious guard dog. Drawn in by the allure of belonging to a "family" that appreciates his daring nature, Peter agrees to orchestrate a series of high-stakes, elaborate heists targeting local markets and lavish apartment complexes, gradually escalating his criminal activities far beyond innocent pranks.Back at the farm, Thomas and Bea realize Peter is missing and launch a frantic rescue mission, navigating the chaotic urban environment to track him down. Meanwhile, Peter’s loyal siblings—Flopsy, Mopsy, and Cotton-tail—along with his cousin Benjamin Bunny, also embark on a rescue expedition, determined to bring their errant brother home. However, tensions peak when Peter discovers that Barnabas’s ultimate plan is not just about survival, but a massive, catastrophic dried-fruit heist that involves betraying Peter and his entire biological family to a ruthless human buyer.Cornered and facing the ultimate consequence of his misguided ambitions, Peter realizes that true family and friends loved him for who he genuinely was, flaws and all, rather than the rebellious persona he tried so desperately to escape. In a thrilling climax involving a high-speed chase across the city rooftops and bustling docks, Peter orchestrates a daring counter-scheme to outwit Barnabas and his syndicate, successfully rescuing his captured siblings with the timely assistance of Thomas and Bea. Ultimately, Peter returns home to the farm, reconciled with his past, secure in his identity, and ready to embrace a harmonious future alongside his loving family, having finally learned that running away is no substitute for self-acceptance.