'A thought came to me that I couldn't force away: What we are wearing is how we'll be identified out in the wilderness.' A heart-stopping, page-turning thriller that sees a trip of a lifetime - white-water rafting in the remote US wilderness - turn into a battle for survival for four best friends Win Allen doesn't want an adventure. After a miserable divorce and the death of her beloved brother, she just wants to spend some time with her three best friends away from her soul-crushing job. But athletic, energetic Pia has other plans. Plans for an adrenaline-raising, breath-taking, white-water rafting trip in the Maine wilderness. Five thousand square miles of remote countryside. Just mountains, rivers and fresh air. No phone coverage. No people. No help.