During a party, a tsunami hits the coast of California, and Denver and a handful of others escape death and are swept out to sea. Of course, one of her fellow castaways is none other than her ex-BFF, Abigail, who can barely stand the sight of her. Trapped on a small boat with the most popular kids in school and waiting to be rescued, Denver wonders what might kill her first--dehydration, sunstroke, or the girl she used to think of as a sister?