Continuation of the adventures of old and new heroes that began in “The Secret of Pito-Kao.” After a short lull, events begin to develop rapidly after the strange disappearance of the wife of journalist Bob Houghton. Meanwhile, the Soviet Union sends a scientific expedition on a nuclear helicopter to the area of the island of Pito Kao. The new company Discovery, created by the fish king Bergoff, is also showing interest in this place...