During an extended sequence, we hear thunder and we see lightning and rain pouring from the sky as a narrator explains that chimpanzees are on the prowl to attack another group: we see one group of chimpanzees attacking a second group, we hear shrieks and the sound of the chimpanzees beating tree trunks and the screen goes black as we hear a chimpanzee shriek; we learn that a female chimpanzee was separated from the group and was severely injured and as the female chimpanzee's young son looks for her, we hear the narrator explain that it was probable that a leopard had eaten the injured chimpanzee during the night and that multiple chimpanzees had been killed by leopards previously.
A narrator explains that chimpanzees are hunting monkeys to eat: two chimpanzees corner a monkey, they knock one down from a tree as the monkeys shriek and run away, and we see the chimpanzees surrounding what is implied to be the dead body of the monkey as one chimp pulls meat in his mouth.
Chimpanzees scream and approach other chimpanzees; we hear them pounding on trees and shrieking, we then see them racing away from one another as one chimpanzee charges toward the group and the narrator explains that the smaller group of chimpanzees had scared off the rival group, saying that there will "only be one victor."
A narrator explains that a group of chimpanzees are rapidly approaching another group of chimpanzees in order to challenge them for coming into their territory; we hear the chimpanzees screaming and beating on a tree, chimpanzees run through the forest floor screaming and we see them racing through the forest in retreat and the narrator explains that a female chimpanzee and her young son are forced to, "run or die" and we learn that the conflict resolved itself without injury or a battle between the two groups.
A chimpanzee tries to intimidate a group of chimpanzees, shouting and storming back and forth; the chimps ignore him.
A young chimpanzee struggles to find his place in a group of chimpanzees after he realizes his mother has died and a narrator explains that the young chimpanzee is growing weaker by the day because he is not eating; we see the young chimpanzee curl up on the ground as the narrator implies that the chimpanzee might die, saying that an attacking group of chimpanzees "might have taken more than one life" in the night where the young chimp's mother was killed (we see the young chimp later, unharmed and recovering after being adopted by an older, male chimpanzee).
A chimpanzee shrieks and shouts as bees sting it.
On two occasions we see a chimp accidentally smash his foot while trying to crush a nut with a large rock.
Throughout the movie we see groups of chimpanzees playfully wrestling with one another, shoving one another off branches and tackling one another.
A narrator explains that at night leopards prowl the forest floor, so chimps must sleep in the trees for safety.
A narrator explains that a female chimpanzee will "do anything" to protect her young son.
A narrator explains that a group of chimpanzees are leaving a safe zone in the jungle and they are approaching an area that has been a battle zone in the past, as it is patrolled by a rival group of chimpanzees.
A narrator half-jokingly says that it is not smart for a chimpanzee to try to "eat something that will eat you back" after explaining that a type of ant can strip a lizard or frog to the bone in a matter of minutes.
A narrator jokes that no one would attack a chimpanzee and a younger chimpanzee or "pick a fight with the guy next to him."
We see chewed up food hanging out of a chimpanzee's mouth as a narrator explains that they chew up the food repeatedly to drain the pulp, and then adding, "That's a good look."
During the credits we see outtakes of the following:
A woman shouting when she sees a snake and a man remarks "It probably won't kill you immediately;" a man screams when he is swarmed by bees and he shouts as he is stung; a man stumbles and falls to the ground as he walks through a forest; and a man shouts and slaps his ankles as ants attack him.
