Quiet cartoonist Mia is forced to stand in for her influencer sister Ella on a hit dating show. There she runs into Leo, her high school crush. For a decade, Leo has kept every tiny memory of her. They uncover the truth: Ella stole Mia's college letter and split them up on purpose. Mia steps out of her sister's shadow, draws their lost love into comics, and at last opens her long-shuttered heart to him.