The love between Su Wan and Lu Chengyu began with their tender first encounter in the university library. From their youthful companionship on campus to living together after graduation, Su Wan has been immersed in the happiness wrapped in love. However, after Lu Chengyu was promoted, everything quietly changed - his mobile phone suddenly had a password set, an unfamiliar rose perfume smell appeared on his body, there was a lipstick mark on the collar of his shirt that did not belong to Su Wan, and there was unfamiliar long black hair on his cuffs.
Su Wan's trust began to collapse. She pretended not to care, but she couldn't help but feel suspicious. Accompanied by her best friend Lin Wei, she went to Lu Chengyu's company and learned that he was eating in a Western restaurant with a female client in a white dress and long hair. Su Wan rushed to the window and saw Lu Chengyu lovingly feeding Bai Ling steak and gently arranging her hair. That scene completely shattered her fantasy.
After returning home, Su Wan tentatively mentioned marriage, but Lu Chengyu shied away on the grounds that his career had just started, and his words were full of perfunctory words. Su Wan accidentally learned that Bai Ling was Lu Chengyu's first love. Late at night, she couldn't help but try to unlock Lu Chengyu's mobile phone. She successfully opened it using the date when Lu Chengyu graduated from high school and Bai Ling went abroad. WeChat was full of ambiguous chat records between the two.
Those gentle words that were once spoken only to her have now become perfunctory to another person. Su Wan guarded these heartbreaking truths and lay beside Lu Chengyu, tears falling silently. The deep love and future she thought were nothing but an empty joy that deceived herself and others, and the cell phone she never thought of checking had already hidden the answers to all betrayals.