A group of aliens has come to Earth to learn about its population, customs, etc. To avoid detection, they have taken on human form which gives them human emotions, physical needs etc. WITHOUT the understanding of what they mean or the inhibitions normally present in humans. Their leader takes the position of a college professor, their military expert as his sister, their intelligence expert, supposedly oldest of group takes form of his teenage son. The uninhibited reactions turn everyday events into unusual situations. 　　译文(2): 一群外星人来到地球，了解地球的人口、习俗等。为了避免被发现，他们以人类的形态出现，这给了他们人类的情感，身体的需要等等。没有理解它们的意思或者人类通常表现出来的抑制。他们的领导者是一位大学教授，他们的军事专家是他的姐姐，他们的情报专家，据说是最年长的一个组成了他十几岁的儿子。这种无拘无束的反应将日常事件变成了不寻常的情况。