Jin Shengjin (Zheng Zaiyong) lost her job due to the reorganization of the company, at the same time, she was heavily in debt and his wife left him. Jin Shengjin, who was completely disappointed in life, climbed the bridge of the Han River and jumped …... However, after Jin Shengjin woke up, she found herself drifting to an island in the middle of the Han River. after a brief failure in her escape efforts, Jin Shengjin fell into a situation like Robin Sun on the edge of the city, recalling the cramped busyness of modern life. Jin Shengjin gave up the idea of suicide and began to live an outside life by relying on all kinds of waste products on the island. At the same time, in a high-rise building in the city, an autistic Miss Jin (Zheng Liyuan) happened to use a camera to witness Jin Shengjin's suicide. This year, the life of a girl who only spied on the streets during the exercise has since broken into an alien city, Robinson. Miss Jin entered the dangerous street for her at night in order to send her own signal, while Jin Shengjin responded with big words on the beach. The wonderful pen pals slowly maintained this friendship, but in the chaotic city, where will the relationship go?