From Hell It Came

Kimo, prince of a South Seas island whose residents are suffering a plague epidemic, is accused of murdering his father, the chief of the island natives. Kimo is alleged to have administered to his father poisonous medicine provided by a group of American scientists stationed on a field laboratory on the island. The true murderers of Kimo's father—Tano, a witch doctor, and Maranka, the new chief—sentence Kimo to be executed by having a knife driven into his heart. Kimo begs his wife Korey to exonerate him, but she denies his innocence. He swears revenge on Tano, Korey, and the new chief, Maranka. After his execution, Kimo is buried in a hollow tree trunk.