On an expedition to return Amy, his talking gorilla, to her home in the Congo, Professor Peter Elliot is joined by others who hope to find a legendary diamond mine guarded by mutant gorillas.

Kurt Austin, Joe Zavala, and members of the NUMA Special Assignments Team are called in to investigate after ships are destroyed near the Azores and they find themselves entangled in the ambitions of an African dictator who may have developed a weapon with extraordinary power.