You have probably heard of the phrase "To think outside of the box"?
Well this is a film about such a box and the flat-headed creatures that live inside of it. Life in the Box is boring and miserable. Until one day when a new baby boy starts to grown in the middle of the Box! This baby is very different from other flat-headed inhabitants of the Box. He's happy, lively and curious. As the baby grows bigger and bigger, the flat-headed neighbours are becoming more and more annoyed with him.