It is discovered that two people from different time periods - Gu Xiaojiao from 2018 and Lu Ming from 1999 - have both woken up in the same bed at the same moment in the same space-time. Perhaps even more unexpectedly, they discover that they have the ability to time travel just by exiting their chamber. When they begin to arrange a variety of alterations inside these two eras, the excitement really begins to build. Their fate is in the hands of an unknown individual, though, and they are unaware of this.