In nature, sleeping means risking a state of great vulnerability. Every species needs a strategy to survive sleep in an unpredictable environment. Sumatra's jungle resembles an urban megalopolis where every night, some go to bed while others get up…

在这些面积可达法国两倍的森林中，矗立着一座巨大的野生城市。隐藏在树上、树下、树木中，成千上万的动物居住在一起，将它们各自的命运交叠在这座从不休眠的巨大都市中。