Peter Saville (David Asanavond) son of a wealthy father, whilst searching for rare comic books, stumbles on an unknown store in Chinatown, Bangkok.  Obtaining rare copies is difficult, even to a seasoned collector.  An old Chinese man (Lek Chiyan) offers him a rare ‘Drew Sangster’ in exchange for a donation to the old Chinaman’s local Temple. 

His father Thomas Saville (Ken Streutker), a wealthy well known socialite is an antiquities dealer with unexplained wealth and unlimited capital.  He has arranged the trip to Shadow Island but has a disturbing motivation for doing so, that of the sacrifice of his son and his son’s friends for his own devious past and debts, a pact made with evil for greed and self interest.

Travelling with his sexy girlfriend Simone (Angela May), a smart, archaeology student and graduate friends, Jack and Jane who have also just finished University, they are all part of Saville’s sacrificial ‘lambs’.

He has arranged the hire of the old yacht “Destiny” with its strange, withdrawn, mysterious captain Robards (Keith Lounton).

The captain warns them about the island but youth, adventure and a celebration of the end of their studies is too hard to bypass and they ignore the captain’s advice and leave him on the boat and head to shore, build a campfire and go in search of adventure. 

They stumble on a pool, waterfall and a hidden cave behind it.  The cave has mysterious engravings on the walls which Simone can’t figure out but feels something foreboding in them.

They also discover an ancient idol with one remaining emerald and Simone just manages to persuade Peter to leave it until she solves the riddle of the hieroglyphics.

As the fire begins to drop to embers, the partying starts and Simone is pondering the strange hieroglyphics when it suddenly come to her.

Her friend Jane (Anna Issaraporn) comes to get her to join in the fun.  Simone tries to explain the possibility of an ancient curse, anyone taking anything from the island will forfeit their life.

They are both disturbed by what she has uncovered, but they decide to join the party and forget about it until later.

Jack, (Patou Whale) and the most fun guy, gets them all together.  He has eyes for Simone but tries hard to keep protocol in hand and restrains himself.  Besides, she is preoccupied with what she has found.

On reaching the cover of the trees, he is immediately sober and raids the cave stealing the last remaining emerald setting the island in motion to begin claiming the ‘exchange of lives’, thus fulfilling Saville’s pact with evil.

What follows next is a sequence of events that keeps the viewer on the end of their seats as first Peter, then Jane and finally Jack all disappear. 

Eventually only Simone is left alive and she barely escapes the evil forces of the island.  Rescued at sea, she returns to Bangkok, and goes to Saville confronting him with her theory at having been traded off for the wealth provided by the emeralds he himself had taken as a youth. 

Realizing she is the only survivor of such a sinister plot to sacrifice others, she plays her last hand and outsmarts Saville.  Moments after she leaves the office, Saville meets his demise in full and final settlement to complete the curse of Shadow Island.