The cacophony of cicadas drowns out the secrets and heartaches of youth. In her senior year of high school, the quiet, introverted Su Nianwei guards a secret: a life-threatening health condition. When she meets Jiang Yubai, the school’s golden boy, their beautiful romance is soon riddled with cracks by frequent hospital visits and dates cut short without warning.
Her childhood friend Lu Yuan’an, who has always known the truth, silently stays by her side, while her best friend Lin Xiaoman drifts away under the weight of her own family troubles. As her condition worsens, Su Nianwei has no choice but to leave, and her youth comes to an abrupt end.
Years later, the cicadas sing again, and they meet once more, bearing physical and emotional scars. This time, can they overcome the distance between them and find the courage to love amid all that’s broken? This is a story of separation and growing up, of healing one another at last through their scars.