Mel, a faith-filled Pentecostal, has the chance to escape Slow Rapids, Indiana, by attending academic summer camp. The only catch? She has to read forbidden tomes like The Origin of Species. So she forges the permission slip, promising God she’ll bring him a lost soul in exchange. Mel conscientiously uses her Biblical expertise to argue Darwin’s theories, but meanwhile begins to realize that her parents, her pastor, and her church aren’t what she thought.