Liu Lili fell in love with Xu Ge when he was 17 years old and followed him every day for a month. One day a month later, Li Li loudly confessed to Xu Ge at the school gate... Yiyu and Li Li were childhood sweethearts, and he had been guarding her silently... The pain left by Li Li's flamboyant youth was indescribable. Xu Ge left, and Yi Yu went to the beautiful paradise... Five years later, Li Li also left that city. She got her college diploma with honors, but her grandma also left her that day. Abandoned and hurt again and again, it took a lot of courage for her to get up every time she fell. But this time, she decided to leave, leave the city that taught her how to grow up... Lili got on the train going north. In fact, she didn't know where she could go, because no matter where she was, she was just a person. If he wasn't so much like Yi Yu, Li Li wouldn't tell herself to love him. Only when he truly fell in love did Lili realize how wrong he was. Once you give your feelings, once you really fall in love, just like the poppy flower, the toxicity slowly invades your body and attacks your heart...