Danger Island

Searching for the lost city of Tobanya, Dr. Hayden, his daughter, Leslie and his assistant, Link Simmons, discover their first clue in uncharted waters of the South Pacific. Link and Leslie find a treasure chest amongst the remains of a sunken ship. They bring the treasure on board. Just then they spot a boat approaching. It is Mu-tan and his band of pirates. Dr. Hayden covers the treasure as Mu-tan's boat comes alongside their own.

Mu-tan and his pirates board Dr. Hayden's boat and take him and Leslie captive. Upon surfacing, Link goes to their rescue, only to be thrown overboard. After taking the treasure, Mu-tan blows up their boat.

Link is attacked by a shark while swimming to the nearest beach, but manages to frighten him away. He reaches the beach, where a leopard finds him and a fight ensues; luckily, he is not harmed. The leopard retreats and Link collapses on the sand.

After collapsing on the beach, Link is found by Morgan. Out at sea, Dr. Hayden tells Mu-tan where the lost city of Tobanya is, but only after Leslie is threatened by him. Mu-tan tells them they will be going with him and his men, and if they do not find the lost city, they will be killed.

Morgan and Chongo find Link Simmons on the beach, where he had collapsed. At first, Link is afraid of them, but Morgan tells him that they were merchant marines who were thrown overboard and they, too, were washed ashore. They take Link to their cave and explain that the natives of the island are headhunters.

Morgan and Chongo show Link the traps set all over the island by the headhunters. In their travels, they come across these traps and Link is saved by Morgan many times. Chongo sees smoke in the distance and, aware that the headhunters are close by, they start to run back to their cave, only to find themselves surrounded by the headhunters.