Aliens, including dragons and “gargoyles,” reside alongside humans in a world that is similar to a contemporary United States. Nate Jensen, a high school junior, picks up a hitchhiker he barely knows. She is Chosen, a teenage girl selected by her cult for some future ritual. She asks Nate to spend time with her. The smitten Nate is happy to comply, but instead of scoring, he finds himself being drawn into a dangerous world where religion, sacrifice and obligations may all add up to a fatal result.