Theodore (Justice Smith) is a very sad young man, with confused thoughts of self-destruction in his mind all day long. There are also several times when Theodore tries to turn the idea of suicide into reality, but every time at this juncture, something always happens to hinder Theodore's steps into another world. Violet (Elle Fanning)'s sister died, and Violet, who had a very good relationship with her sister, fell into pain and depression. She is studying and can't wait to look forward to the arrival of graduation season, so that she can completely escape from the suffocating Indiana town and the shadow of her sister's death. These two young people met on the clock tower by chance. Theodore found that this lovely and straightforward girl could make him take off his mask and heart, and Violet also felt that every minute and every second with Theodore, time is no longer so difficult for her.