Males from the northern group, led by the alpha male Darius, start patrolling into the southerners' territory and then start to kill, with extreme cruelty, the rival males - one an old chimpanzee called Mr Jeb, and the other Muffin, an adolescent. What she sees brings Hope herself into conflict with Mallabar, and threatens the very existence of Grosso Arvore research project and his lifelong study of primates.
Darius
Jeb