Eep is a girl in a family of Neanderthal Cavemen living and hunting in pre-historic times, talking about how her family is one of the few to survive nearby, mainly due to the strict rules of her overprotective father, Grug. Grug never allow to explore. This irritates the bored and adventurous Eep, and when the family falls asleep after dark, she ignores her father's advice and leaves the cave when she sees a light moving outside the cave.
    Eep是生活在史前的穴居獵人家庭的一個女孩。她的家庭是附近少有的幸存下來的種族，這都源于他父親過于嚴苛的規(guī)定,他禁止外出冒險。但正是這項禁止反而激起了Eep的冒險精神，當晚家族成員都睡著時，她看到洞外的光亮，不顧父親的告誡，離開洞穴。
    Seeking the light's source, she meets Guy, an intelligent Cro-Magnon caveboy. She becomes fascinated with the fire he manages to create and is eager to learn more. He tells her about his theory that the world is reaching its 'end' and asks her to join him. She refuses and Guy leaves, but not before giving her a noise-making shell to call him if she feels the need for help. Shortly afterwards, Eep is then caught by Grug, he brings Eep back home, planning to keep her in the cave for the rest of her life. An earthquake then occurs, sending everyone running for the cave, only to be stopped by Grug moments before the cave is destroyed by falling rocks. Grug takes his family into the deep forest to find a new cave.
    她追尋著光亮，遇到了一個聰明的男孩。她開始著迷于他制造的火種，并且渴望能夠學會。男孩告訴她自己的理論，他覺得世界末日將盡，邀請她加入他的隊伍。她拒絕了，但表示在他需要幫助時可以找她。Eep被爸爸抓到了，帶回了家并且打算讓她的余生都在洞穴里度過。忽然地震發(fā)生了，恰好在洞塌之前，所有人都跑了出來。爸爸不得不帶著家族深入森林尋找一個新的洞穴。
    After they leave, they soon found a colorful world.They meet a lot of animals and the guy who created fire. A new life has just begun.
    他們離開之后，很快發(fā)現(xiàn)了外面的世界豐富多彩。他們遇到了很多動物，以及會生火的男孩。新生活才剛剛開始。