Peter Rabbit and family take over the manor house of Old McGregor when he dies, but McGregor’s nephew arrives to claim his inheritance (on leave from his job at Harrod’s), so bunnies wreak havoc to win it back. McGregor begins dating neighbor Bea (loyal friend of bunnies) to learn bunny vulnerabilities, but a raging war ends up destroying Bea’s cottage instead. The factions make amends while winning Bea back, and wage peace in the end.