Mike (played by Daniel Wu) is an employee of a security software company in New York. His cat died, which made him very uneasy. He came to the priest to pray, but he still couldn't sleep. In his dream, Mike met a strange woman, Ai Ling (played by Yuan Quan). She was distraught because her boyfriend had committed suicide by jumping off a building. Mike tried to comfort her, but was repeatedly frustrated. Because of this bizarre dream, Ai Ling lingered in Mike's mind again and again. He decided to go to Shanghai to find her. By chance, he got her photo in a photo processing shop. Following this clue, he came to Hangzhou, but met Ai Ling's twin sister. It turned out that they were orphans and were fostered separately. Mike returned to New York indifferently, but his heart was full of entanglements. He fell into a dilemma of not being able to eat or drink, so that his company partners began to feel chilled. He came to Shanghai again and met Ai Ling's sister again. However, when both parties confided their thoughts, their relationship also underwent complex changes...