Got to know the movie through this movie ending theme.
A fictional time space movie.
The story starts with both Lu Ming and Gu Xiaojiao actual situation of their daily life repectively in 1999 and 2018. Interestingly, both characters had some troubles in their work and financially.
Their apartment in the same physical location merged overnight. To Xiaojiao's horror, she saw Lu Ming on the other side of the bed. Both of the characters ran around the house and with all shock and confuse they found the main door actually access to 20 years apart. With the curiosity, they also found out that the house will turn smaller if they tries to access to each other world.
Many sweet and bitter memories were shared during the cohabitation. When the reality strikes, Lu Ming in 2018 wants Xiaojiao to leave the 1999 Lu Ming in order not to make any changes in the current 2018.