Dawn grows up in the shadow of a nuclear power plant. In high school, while her biology class studies evolution, she realizes she may have a hidden curse, an "adaptation." She lives with her mom, step-father, and hard-edged step-brother. She likes Tobey, a guy at school, and he likes her. She takes a pledge to remain chaste until marriage, so they date in groups, watch G-rated films, and don't kiss, but the power of teen hormones is great, so temptation beckons. Dawn has an admirer in Ryan, and...