Molly Fredrickson is a student at college in San Diego and busy finding out all the fun, rude and lewd stuff you can do as a free, far-from-home, college student! Room-mates, faculty, basketball teams, oh yeah! There's plenty on her horny plate. In Peanut Butter Vol.5, Molly gets to read her friend Erica's hot diary. Some of her experiences take a trip on the edge.