Going on a safari is a dream for many. For middle-aged couple Linda and Troyer, it turns into a horribly real adventure when they get left behind in the wilderness.

Every year, on the steppes of the Serengeti, the most spectacular migration of animals on our planet: Around two million wildebeest, Burchell's zebra and Thomson's gazelles begin their tour of nearly 2,000 miles across the almost treeless savannah. For the first time, a documentary captures stunning footage in the midst of this demanding journey. The documentary starts at the beginning of the year, when more than two million animals gather in the shadow of the volcanoes on the southern edge of the Serengeti in order to birth their offspring. In just two weeks, the animal herd's population has increased by one third, and after only two days, the calves can already run as fast as the adults The young wildebeest in this phase of their life are the most vulnerable to attacks by lions, cheetahs, leopards or hyenas. The film then follows the survivors of these attacks through the next three months on their incredible journey, a trip so long that 200,000 wildebeest will not reach the end.

这个搞笑呆萌而又残酷的故事发生在非洲大草原。牛羚（角马）大迁徙的路上不免要跨越大河川流。在一处岸边，两头牛羚正盯着水中一个表面粗糙的物体发呆。2号牛羚认定这是一截木头，1号牛羚则坚称这是一条鳄鱼。1号先是扔石子、树枝戳，之后更跳到那个物体上面。两头牛羚谁也说服不了谁，彼此僵持不下。 看来也只能用事实来说话了。当然，有些事情不亲身经历一下是不会清楚的，即使这个经验来的如此血腥……

广袤无垠的非洲大草原，数百万头角马的迁徙可谓生物史最令人叹为观止的壮观奇景之一。每一年的6月到9月期间，生活在肯尼亚马赛马拉国家公园的角马以及斑马、瞪羚组成的迁徙大军便浩浩荡荡地上路，从坦桑尼亚的塞伦盖蒂草原逶迤来至水草植被茂盛的肯尼亚的马赛马拉草原。虽然拥有数量上的绝对优势，但是沿途的残酷自然环境以及鳄鱼、狮子、鬣狗等肉食性掠食者将给这群逆来顺受的食草动物构成最大的生命威胁。 此次BBC摄制组调动大规模的拍摄阵容，试图近距离地记录下角马群迁徙过程中每一个珍贵瞬间。为了不惊扰这些胆小的动物，摄制组采用各种伪装术接近角马，比如将摄像机藏在遥控乌龟、鳄鱼、蜻蜓体内，或者放在沿途的石头、动物头骨中。功夫不负有心人，这些“间谍”记录下从前从未有过的罕见而惊人的珍贵画面……