This story that has been made a movie starts out a page turner, in
the eastern jungles of what used to be known as the Belgian Congo,
presently Zaire. When the locals are reluctant to accompany an American
expedition towards a mountain area they regarded as possessing evil
spirits, their fears are waved off as mere African superstition. But the
same night they camp at their destination, everyone is killed and their
camp destroyed.
Far
away in Houston in the US, a video of the destruction is watched via
satellite, up to the point of demolition of the transmission equipment.
The firm responsible for the expedition, due to the priceless object of
their quest—blue diamonds for use in super-fast weapons and computing
electronics—raises another team to go right in secretly, by so doing
covering up the loss of the first one.
Going along with the second team is Amy, a female mountain gorilla
that has been raised by a scientist (Elliot) who has taught her hundreds
of words in American sign language. She has just gone through a
depressive period that could not be explained except for drawings of
strange buildings with semicircular doors and windows. It turns out the
drawings are from her childhood past, of the ruins of a famed lost city
in the African jungles that Arabs referred to as Zinj. She had been
rescued very young on being found crying next to her murdered parent and
now she is about seven years old, the equivalent of a human teenager.
The second team is also aided by a famed white European-African
(Munro) skilled in the wars and peoples of the continent from Kenya
where he was born up to Algeria, selling his skills to the highest
bidder. They risk warring or hostile locals and rough rivers to arrive
the ruined lost city of Zinj to find the two camps of earlier
expeditions destroyed by the same mysterious creatures. (The other camp
was by a competing Euro-Japanese group also gunning for the diamonds.)
The creatures are gorilla-like and so the importance of “talking” Amy
to the second expedition now comes to light. Their hair is silver
rather than black, they have a whispering mode of talking to each other,
their eyes are colored differently, and while ordinary gorillas sleep
at night, these ones do not. (Scientist Elliot believes he has
discovered a new species, and can’t wait to return to America to stake
his claim.) The second team is better prepared so they are able to fend
the silver gorillas off the first two nights. By exploring the ruins of
the lost city during the day, the team—aided by computing power in
Houston—discovers that the black inhabitants of the city about 500 years
before had trained the silver gorillas to use stone paddles to attack
enemies and thieves. They had been trained as guards for the mines that
produced the diamonds the city appeared to thrive on. With the humans
all gone for unknown reasons, the new gorillas still remained to
continue playing their attack roles, teaching their offspring to use
stone paddles to crush the skulls of any intruders to the area.
Amy is able to stop the new gorillas from killing Elliot at one
point. As it was exactly in that locality that she was born, she could
understand the whispering language of the new gorillas and so is able to
translate some of their words for Elliot. (The silver gorillas it were
that murdered her mother years ago.) From these translations, Elliot and
Ross, the female representative of the expedition firm, are able to set
up a taped broadcast telling the silver gorillas in their language to
leave them alone, and this becomes their saving grace when the gorillas
come for a final attack on their camp.
The precious blue diamonds are eventually found the next day. But due
to the recklessness of lead scientist Ross, a massive volcano siding
the valley of the ruins is hastened to eruption right away. Save for a
few pieces Munro kept in his pocket, they have to abandon the diamonds
and everything else in a race to escape the massive volcano as it spews
forth lava and ash and dangerous gases.