Cate is a smart, working class girl under the thumb of her best friend Maddie, but Cate is having trouble conforming to what Maddie and high school society demand of her. Both girls are preoccupied with the same boy, but only one of them is being sent poetry.

Simon is on a date with a pathological liar. As the romance progresses and the lies grow darker and more elaborate, Simon is left to wonder if he will get the girl or if he will get out alive.