Tessa (Josephine Langford) is a girl who has always behaved well. In the eyes of her parents, she is a good and obedient daughter. In the eyes of her boyfriend, she is a good girlfriend who is considerate and sensible. In the eyes of her teachers, she is a good student who obeys rules and rules. Such a girl meets a boy named Harding (Hero Fiennes Tiffin) after she steps into the university campus. Harding was different from all the boys Tessa had met. He had unruly eyes, a fancy and exaggerated appearance, and he was always unconventional in doing things. Tessa's first impression of Harding was not good, but as time went by, some unique temperament in him gradually attracted Tessa, and she began to yearn to become a free person like him. In a strange accident, Tessa and Harding kissed, and then Harding's erratic attitude made Tessa more addicted to him.