海洋生物学家Skylar Shane高金聘用了一个海外“船长”，杰克。希望他可以帮助自己去北苏门答腊岛找寻史前生命的印迹。一路随行的还有杰克船长的其他的所谓的“朋友”。在路上，遇到了一个男孩，Tamal是一个被他叔叔一直扣押着做奴隶的孤儿，他乞求Skylar Shane可以带着他一起去，她看到Tamal总会让她想到自己失踪的女儿Rebecca，于是她决定带着男孩一起。Marine biologist Skylar Shane hires an expat charter boat captain, Jack Bowman, to help her find prehistoric life form samples in the north Sumatran Sea. During the expedition, they run into some of Jack's 'friends', a gang of smugglers headquartered on a fishing platform in the middle of the sea. Tamal, an orphan sold into servitude on the fishing platform by his uncle, a 'Dukun' (sorcerer and master of black magic) shaman, begs Skylar to take him away. She empathizes with the boy, who reminds her of her lost daughter, Rebecca, and is determined to help him, not knowing what lurks beneath the dark inky water, waiting to surface. Ever since Tamal arrived, mysterious things begin to happen, until one by one the smugglers will be killed by the terrifying creature from the deep. In the middle of an eerie, violent storm, the animus inside Tamal grows stronger, calling for the ancient creature of his nightmares. Now Skylar and Jack must battle the terror - once locked deep in the abyss by an old civilization, as it is now about to resurface.