Sea of the Dead (2004)

Lily learns of a legendary treasure of pearls hidden on Koh Mook, or Pearl Island, in the Andaman Sea. She joins a group of explorers seeking the treasure, aided by a local village headman and a young woman with unusual intuition. The girl senses impending danger, but the expedition presses on, undeterred. Legend says no one who has ever searched for the pearls has returned. As the journey progresses, disagreements arise over how the treasure will be divided. Will they find the pearls? And will anyone survive the search?