Ke Zhen Yu is a prideful lawyer who has never lost. While working on the case revolving around a hotshot judo instructor, he suddenly loses his job and reputation after being sued by Prosecutor Mu Si Ming for fabricating evidence. Down and out, he moves to an old apartment where strange things begin to occur. Whenever the clock strikes 10:06 at night, a female tenant appears. Ke Zhen Yu initially thought that he was seeing a ghost until he realizes that the woman is rookie reporter Cheng Jia Le. She is a former tenant from four months ago and through some miracle, they are able to see each other. Ke Zhen Yu wanted to use Jia Le to change his past, but soon realizes that romance has bloomed. However, Ke Zhen Yu finds that the murder case that has cost him everything still looms above their heads.

In this fantasy investigation series, investigators from two eras must hunt for the truth in old unsolved cases, communicating only through an old radio. The signal between the past and the present only opens at 23:23.