A family divided, a relentless storm, and a killer on the loose. What starts out as a week-long boat trip to save a troubled family, dissolves into a savage fight to save their lives. An obsessed stalker has tracked Jill Dunne, her husband Sean and daughter Olivia, miles down a treacherous river. His desire is to claim the Dunne family as his own-but first, he must get rid of Jill's husband. As darkness falls and the storm rises, the killer approaches with ghostly precision-igniting a deadly confrontation between the hunter, the hunted...and nature's fury.