This is the story of a young adolescent Hainan gibbon, who must leave his family behind and find his own way, his own territory and a mate in the fragmented rainforests of Hainan Island, China.
Loud sounds echo through the tropical mountain rainforest of Hainan Island. It is the dulcet duet of a gibbon couple, in which both partners sing harmonious verses to each other while their youngest son tries to sing along. The small gibbon family lives high in the rainforest canopy. Shared meals, affectionate grooming and playful chases through the treetops all feature in the everyday life of this family. But recently, their songs are no longer in harmony; the young gibbon’s parents have started chasing him away when he raises his voice to chime in. At the same time, the conflicts over the few available food sources grow more and more violent and rhesus macaques, tree shrews and fruit bats steal from the little the gibbons rely on. Today there are only 28 animals left, making them the rarest of their kind and foretelling a dark future for our young hero. Where can he go?
Here enters an international conservation project led by the Zoological Society of London. They have decided to build canopy bridges to re-connect the fragmented patches of rainforest and help the tree-dwellers conquer new territories. They intend to help the Hainan gibbon population get back on track, returning their original habitat to them and saving them from the peril of extinction.