麥奎格（當勞格利遜 飾）同碧雅（露絲拜恩 飾）終於有情人終成眷屬，拉埋天窗。碧雅還將她和一班小動物的故事寫進兒童書，意外令比得爆紅。原本故事發展順利，但何解比得突然要離家出走？！因為人人知道他的頑皮事蹟後都當他是百厭星，有破壞無建設。不甘心被定型的比得為了尋找自己的小天地，遠走他方闖蕩江湖。一班可愛小動物決定跟到天腳底，從菜園到城市冒險，卻一不小心遇上大麻煩。待比得如子的麥奎格同碧雅當然出手相救，為了可以一家團聚，兩人一兔齊心踏上拯救之旅！

比得（森美 聲演）和賓仔（陳豪 聲演）一家本來同班動物老友住在菜園，晚晚狂歡開Party，過得好Happy！點知，新屋主麥奎格先生（當勞格利遜 飾）入伙後，竟將所有動物趕走，仲扮好人贏得靚女鄰居碧雅（露絲拜恩 飾）歡心，激到比得紮紮跳！為重奪安樂窩，比得一家決定執行「玩謝麥奎格」行動，出盡奇招誓要趕走敵人！由菜園鬥到去倫敦，鬧出連串笑話，人兔大戰最後到底點收科？

The story focuses on a family of anthropomorphic rabbits, the widowed mother rabbit cautioning her young against entering a vegetable garden grown by a man named Mr. McGregor, telling them: "your Father had an accident there; he was put in a pie by Mrs. McGregor". Whereas her three daughters obediently refrain from entering the garden, going down the lane to pick blackberries, her rebellious son Peter enters the garden to snack on some vegetables. Peter ends up eating more than is good for him and goes looking for parsley to cure his stomach ache.