Passion and Purity starts out with Elisabeth, a senior in college, questioning God, asking Him why she was still single. She touches on the topic of the difference between singleness and virginity, her view on how each was equally important to her. Elisabeth first learns of Jim through her brother Dave. Through the next few years after their meeting they struggle with being apart, being together, loneliness, and self-control. Elisabeth shares her personal struggles through journal entries and letters between her and Jim. While she fights against loneliness, doubts in Jim and in God, Jim struggles with the more physical restraint side. She also talks about what men and women want in a relationship.