In a future where being Christian = Death. A girl from Indiana who tries to forget her past. A boy from Georgia who tries to live his faith. A boy from South Carolina who tries to make a plan. On a mission for the Dren, a society of people who kill Christians, Ryder meets Dillion, a Christian boy from Georgia. Together they escape Dren headquarters for Charleston to save a group of Undesirables (Christians) hiding there. Ryder must choose a side. Help the people she swore to kill or help kill the people who've shown her nothing but kindness.