Ten years ago, on a train home during the busy Spring Festival travel period, fate brings Xiaoxiao and Jianqing together. Like many young couples, they meet, fall in love, and strive to make it work, but eventually, the harsh realities of life make them drift apart. Ten years later, they run into each other again. Will they make the most of this second chance and rekindle what they once lost?

Korean remake of 2018 film "Us and Them".

Jules and Chris, two adult former exes who had a bitter past, reunited 5 years after to fix their broken relationship they had when they were teenagers. As they rebuild their lost spark, differences occur when they have to confront the changes that happened to their lives and face the matured version of themselves.