一个小女孩和她的奶奶坐在河边，"河是什么呀？"好奇的小女孩问奶奶。就像许多好奇心强的孩子提出的问题一样，这个问题问出来时看似简单。然而，它的答案却涉及整个世界：地理和历史、科学和宗教、工业和环保。通过作者兼插图画家Monika Vaicenavičienė的眼睛，河流成了一个无所不包的容器，通过这个镜头，我们可以理解我们共同生活的地球存在的相互联系。

“What is a river?” an inquisitive young girl asks her grandmother as the pair sits together on the river’s banks. Like many questions posed by curious children, this one is deceptively simple in its asking. Yet, its answer spans the very world itself: geography and history, science and religion, industry and environmentalism. Through author-illustrator Monika Vaicenavičienė’s eyes, the river becomes a vessel for enormous complexity, a lens through which the interconnectedness of our shared earth can be understood.