Turok and Andar cross a river looking for an exit from Lost Valley, and Turok is abducted tree dwelling primitives, who are the "Terror In The Trees." Andar must find a way to rescue Turok before they decide to kill him. Then, the Indian youths observe a tribe of cave men who capture a flesh eater in a net and put it in "The Pit Trap." Turok and Andar help prisoners of the cave tribe to escape, only to become prisoners themselves, and find themselves thrown into the pit.