The massive triangular shape of the mountain called Walshs Pyramid stands one thousand metres above the floodplain of the Mulgrave River in Far North Queensland. Eight army cadets on holiday have been hiking towards it. Among them are three of 'The Hiking Team': Peter, Graham and Stephen. There are also four 16 year-old girls: Gwen, Joy, Megan and Charmaine. As they reach the base of the mountain they encounter a shadowy figure dressed in black who tells them a tale so bizarre they find it difficult to believe. But not Stephen. He knows that it is true and convinces the group to act immediately. As they climb the mountain in a desperate race against time, they collide headlong into a fearsome struggle for life and death with forces they barely imagined existed. Over the ensuing four days they are tested emotionally, spiritually and physically as they seek to vanquish the evil that lurks atop the mysterious pyramid.