The blonde girl Tang En (Jess Weixler) had a carefree campus life like other young girls of the same age, but suddenly one day, Tang En found that there was a place in her body structure that was very different from ordinary people. She actually had a row of teeth in her vagina. In school, Tang En led a group of people with the same aspirations to form a publicity team called Commitment, which aims to advocate peers to keep virginity. Tang En herself has always strictly followed the rules and regulations set by her team until she met Toby (Halle Appleman), a boy who also holds the same belief. The relationship between Tang En and Toby progressed rapidly. One day, the two played and frolicked by the waterfall by the lake. In this romantic atmosphere full of temptation, Toby and Tang En finally couldn't control themselves and had substantial physical contact. What was terrifying was that in the surging passion, Toby's thing was cut off by Tang En's teeth. This tragedy shocked Tang En herself. After that, she went to the doctor for help, but it seemed that no one could explain and solve this phenomenon. From then on, Tang En began to experience a series of incredible events with her tooth.