In "The Kissing Booth 3," the story continues with Elle Evans facing a pivotal summer before heading to college. She must make important decisions about her future, including her relationships with Noah Flynn and Lee Flynn. As Elle navigates her feelings and ambitions, she grapples with the pressure of choosing between her dreams and her friendships. The film explores themes of love, loyalty, and self-discovery, culminating in a heartfelt conclusion that impacts all the characters involved.