Claire Cook and Eva James are strangers from very different worlds, but with a common goal: to disappear. After meeting at an airport bar, they swap plane tickets, phones, and IDs, hoping to leave their old lives behind. Claire takes off for Eva's hometown of Oakland and Eva heads for Claire's work-trip destination of Puerto Rico. But when the Puerto Rico flight crashes, Claire finds herself propelled into a new existence even more perilous than her last. (CH)