Determined to find the mysterious mountain that seems to appear and disappear from view, the castaway monkeys use all their skills to orient themselves in their search unaware of the dangers surrounding them as they move into the forbidden territory of the Tamarin kings, the secret rulers of the island.
Having finally concluded that they are not alone on the island, the eight castaways try to piece together evidence that will help them identify the other inhabitants.
Determined to solve the mystery of their disappearing food stores and to further explore the island, the eight castaway monkeys try to orient themselves by looking for the shapes that Bushbaby saw in her dream.
Despite Bushbaby's misgivings, the young castaways befriend the spider monkey that was stealing their food especially after he promises to give them information about the hidden rulers of the island.
Shipwrecked on a remote island, a group of disparate monkeys try to agree on how best to survive their ordeal unaware that their actions are being watched and judged by the monkeys that rule the island.