叶凡（杨昊铭饰）在大学毕业前夕向暗恋多年的陶萄（关芯饰）告白成功，不想当天陶萄车祸去世，叶凡痛失爱人。接着，叶凡偶然得到陶萄的一部旧手机，误打误撞接通了四年前、2018年正在读高三的陶萄。这一通电话偶然地改变了两人的命运，也开启了两人通过神奇的旧手机互相救赎、互相牺牲的一段奇幻爱情之旅。
Juliette's problem is that she is totally incapable of making up her mind about anything. So even at 40, she still asks her father and her two best friends to choose everything for her. When her love life crosses the road of Paul then of Stephen, as charming and different as the other, necessarily, the heart of Juliette swings. For the first time, nobody can decide for her .
