Emerald Island, a tropical haven, where 15 year old Patrick (Kevin Zegers) spent many happy summer holidays. But now ever-expanding industrial plants have replaced the summer homes and in place of the friends with whom he played, a hidden and unimaginable terror lurks. Within minutes Patrick's world collapses as his family are attacked by fearsome creatures, leaving him orphaned and unable to describe the traumatic events he barely survived. Patrick's grandmother locates Victoria Juno (Jill Hennessy), a fiercely committed young doctor who believes she can help him. She decides that the best way to dislodge Patrick's memories is to return him to the scene of his terror - the island whose bloodthirsty inhabitants robbed him of the ones he loved. But the devilish terror that existed before has grown in number and ferocity. When Patrick, Dr. Juno and their party arrive on the island, they are met with deadly consequences. Dr. Juno must take on insurmountable odds in order to recover Patrick's psychological well-being and Patrick must come face to face with his greatest fear. But can any human overcome the predatory instinct of the Komodo Dragon?