Cliff and Cydney (Steve Zahn and Milla Jovovich), an adventurous young couple, celebrate their honeymoon by backpacking to the most beautiful, and remote, beaches in Hawaii.  They have found paradise as they hike into the wild, secluded trails.  

A horrifying murder of another newlywed couple on the island, Cliff and Cydney question whether they should turn back. 

They join up with two other couples, and things begin to go terrifyingly wrong.  Far from civilization or rescue, things begin to look like a threat and nobody can be trusted.  Paradise becomes helter-skelter as a vicious battle for survival begins.