Elle Evans (Joey King) just had the most romantic summer of her life with her reformed bad-boy boyfriend Noah Flynn (Jacob Elordi). But now Noah is off to Harvard, and Elle heads back to high school for her senior year. She'll have to juggle a long-distance relationship, while she and her best friend Lee Flynn (Joel Courtney) work on getting into their dream college, Berkeley. Complications arise when Noah convinces Elle to apply to Harvard as well, and a handsome, charismatic new guy named Marco (Taylor Zakhar Perez) shows up at school and everyone is immediately obsessed with him.
Although Elle gets off on the wrong foot at first with Marco, they soon become friends. Meanwhile, Noah grows close to a seemingly-perfect college girl (Maisie Richardson-Sellers) and Elle has to decide how much she trusts him and to whom her heart truly belongs.