Honeymooning newlyweds Cliff (Steve Zahn) and Cydney (Milla Jovovich) are hiking an 11-mile trail in Hawaii when they cross paths will ex-military man Nick (Timothy Olyphant), who earns their trust by helping them navigate a particularly treacherous mountain cliff. A few yards later, the trio runs into a group of girls whose parents are begging them to return home following reports that a honeymooning couple has been murdered on one of the other islands.