Life has returned to normal for Hanna, Ned and Jik after their adventures in the tempestuous Sulu Sea. But then Dad heads to Borneo to look for gold and everything goes horribly wrong. Dad is accused of murder, and Hanna, Ned and Jik know they must go into the jungle to prove his innocence. It is a race against time but the tropical forest is filled with predators - both animal and human. And what deadly secret waits in the heart of the jungle?