An outpost of the rare military monkey, beside the Grumeti River in Tanzania, comes under pressure in freak weather conditions. The worst drought since 1930 brings stress to all the animals even ancient crocodiles that might remember the last such dry-down. But the resourceful monkeys have a trick or two up their sleeve, as they face competition with their greatest rivals, baboons. Meanwhile, the crocodiles wait in the river: the wildebeest are coming. But the river is about to dry up