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, far 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.