In Britain's Lake District, Peter Rabbit, James Corden and his cousin Colin Moody as Benjamin Bunny, along with his triplet sisters Flopsy, Margot Robbie as Flopsy, Mopsy, and Cotton-Tail, Daisy Ridley as Cotton-Tail, spend most of their days teasing the grumpy old Mr. McGregor, Sam Neill, and raiding his garden. They are also cared for by a kindly local resident named Bea, Rose Byrne, who for years has acted like a mother to the rabbits, painting their likeness and the surrounding countryside. When Peter accidentally leaves his jacket in Mr. McGregor’s garden and is lured back, the old man springs a trap—only to succumb to a heart attack after years of unhealthy habits. The rabbits, emboldened by the turn of events, decide to claim the manor for themselves and invite the local wildlife to stay, turning Bea’s quiet neighborhood into a bustling, if chaotic, frontier.
Across the channel in London, McGregor’s great-nephew, Thomas McGregor, Domhnall Gleeson—a rigid, ambitious, workaholic in the Harrods toy department—navigates a cutthroat path for advancement. After missing out on a promotion and getting fired, Thomas discovers that his great-uncle’s country manor could be a lucrative asset, and he plans to renovate and resell it to fuel his dream of opening a toy store near Harrods. His plan clashes with Peter’s growing rule over the garden, and the two men become rivals in a modern feud that bleeds into the countryside. Thomas’s desire for control is tempered by a budding romance with Bea, whose affection for the rabbits and their art complicates his calculations.
What follows is a playful, escalating war of pranks, traps, and countermeasures that blends mischief with moments of tenderness. Peter and his family tinker with the garden’s defenses—reconfiguring the electric fence, devising clever booby-traps, and widening their domain—while Thomas tries to fortify his plan to oust the rabbits and win Bea’s trust. The conflict reaches a fever pitch when a blackberry allergy and a cascade of detonations threaten Bea’s art studio and the entire yard, leaving Thomas furious and Bea torn between loyalty to her new love and her loyalty to the rabbits who have become an integral part of the neighborhood. The chaos forces Peter to confront the consequences of his own recklessness, and he works with Benjamin to repair the damage, hoping to win Bea back and restore harmony.
In a dramatic turn, Bea learns to see the rabbits as more than pests, and Peter leverages a daring demonstration to show that the rabbits can indeed talk and think—ultimately convincing Bea of their intelligence and charm. The explosive misunderstanding is resolved, and Bea forgives the pair, choosing to stay rather than leave the neighborhood. With the balance restored, the rabbits continue to enjoy a trusted place in the garden, and Thomas finds a way to sustain both his professional ambitions and his relationship. Thomas supports a shared future where wildlife can access the garden in moderation, while he launches his own toy shop in the village, with Bea showcasing her art—including portraits of the rabbits—while the community learns to coexist with their most adventurous residents.
