Li Qin Ai is a magazine photographer who is happy with her career and her relationship with her boyfriend, Zhou Li Yang. She has tried hard to forget her first love, Dai Hai An, after they broke up 10 years ago. When Hai An reappears in Qin Ai’s life unexpectedly, some things are just not right with him. First of all, he is still his 18-year-old self from their youth, and he is “half-transparent.”

黎亲爱（杨丞琳 饰）与戴海安（蓝正龙 饰）17岁时曾是一对男女朋友，但感情不长久，分手后，时间从17岁渐渐到了31岁，两人都有稳定的工作，亲爱也有一段新的感情，一场同学会让两人再度相遇，但因为一场严重的意外，戴海安落水下落不明，而黎亲爱却看见了当年的戴海安，她以为看见的是鬼，没想到他还活着，一切都是她的幻觉..

黎親愛（楊丞琳飾）與戴海安（藍正龍飾）17歲時曾是一對男女朋友，但感情不長久，分手後，時間從17歲漸漸到了31歲，兩人都有穩定的工作，親愛也有一段新的感情。一次同學聚會讓兩人再度相遇，但因為一場嚴重的意外，戴海安墜海下落不明，而黎親愛卻看見了當年的戴海安，她以為看見的是鬼，沒想到他還活著，一切都是她的幻覺...