Harry Styles has social anxiety disorder, he's quiet, shy and innocent, never consumed drugs or alcohol in his life. Caitlin , or some know her as Cat is outgoing, she's a party animal and feared by everyone not to mention her boyfriend, Louis Tomlinson. Louis has influenced her, a lot. Louis is a typical bad boy, drinks, smokes and is plastered in tattoos and piercings. Cat and Louis's posse would make fun of those like Harry, that is until Cat and Harry are forced to spend a night together, that’s when everything changes.