Cameras follow leadership struggles among Barbary macaque monkeys in the Atlas Mountains of Morocco. The troop's new alpha has successfully led the monkeys for a year through a drought and a frozen winter, but an error of judgment places his position in jeopardy. As mating season approaches, his allies start to turn against him, and a brutal attack sees him deposed, and banished from the group. However, the new leader proves far more aggressive, giving his ousted predecessor a chance to seize his position back. Narrated by David Attenborough.