幽静广袤的大森林中，松鼠妈妈四处为孩子们寻找坚果。可是天敌逡巡，她和孩子们只得待在窝中。耐不住两个小家伙的央求，松鼠妈妈讲了一个咕噜牛的故事：很久很久以前，有一只善良聪明的小棕鼠（James Corden 配音），他漫步在森林中，结果接连遭到狐狸、猫头鹰和毒蛇的袭击。急中生智，小棕鼠声称要与朋友咕噜牛会面。咕噜牛身形庞大，相貌恐怖，并且特别喜欢吃狐狸、猫头鹰和毒蛇。他的大话吓退了天敌，然而好戏还在后面…… 　　本片根据英国作家朱莉娅?唐纳森（Julia Donaldson）以及插画作家阿克塞尔?舍夫勒（Axel Scheffler）的同名原著改编，于圣诞节时在BBC电视频道播放。

The Snail And The Whale follows the amazing journey of a tiny snail who longs to see the world and manages to hitch a ride on the tail of a huge humpback whale. The story is a joyous, empowering tale about the natural wonders of the earth and discovering that however small you are, you can make a difference. This half hour adaptation is a beautiful account of an unlikely friendship, and is voiced by stellar British acting talent, Rob Brydon as the whale, Sally Hawkins as the snail, Cariad Lloyd as the teacher and Dame Diana Rigg as the narrator. Written in 2003 by Julia Donaldson and illustrated by Axel Scheffler, creators of the modern classic The Gruffalo, this marks the seventh BBC One adaptation by Magic Light Pictures of a Donaldson/Scheffler children’s book. The Snail And The Whale is a Magic Light Pictures production, acquired by Charlotte Moore and Tommy Bulfin for BBC One. The producers are Michael Rose and Martin Pope of Magic Light Pictures and directors are Max Lang and Daniel Snaddon.