Before leaving for the camp, Nancy is warned to avoid the secretive Hilihili research compound of Malachi Craven as some believe it's linked to the legend of Kane 'Okala -- a man who narrowly escaped being sacrificed to the volcano but was left with a hideous, scarred appearance. When Nancy arrives at Camp Quigley, she discovers that the camp has been ravaged and Dr. Quigley is missing. As her adventure unfolds, Nancy discovers the Kapu or "forbidden" cave and suspects that something mysterious is hidden behind the Tiki Centennials.