Scientists investigating Borneo funeral totem vanish. Bi and Professor Sani search for them, uncovering the totem's sinister past involving human sacrifice as they probe the mysterious disappearance.

A group of scientists, at the request of the International Heritage Association, arrives on the island of Borneo to collect material about the mysterious funeral totem - Jerunai, which was used by the Melanau people in the sacrifice ritual in the XIII century. The grim story goes that at every funeral, the body of a male slave served as the foundation for Jerun, and a slave was tied to its top, who died a long and painful death from starvation and exhaustion. Soon, the expedition mysteriously disappears. A young scientist Bi and Professor Sani go in search of her.