Five years ago, a warehouse fire caused Qi Ye to be expelled from the police force, leaving a gap that no one dares to trace until now.
Five years later, he had become a private detective. Because of a bizarre murder case, he met Lin Xu, a newcomer who had just put on the police uniform.
One is casual and only trusts his own intuition; the other is rigorous and old-fashioned and relies on evidence in everything. The two disliked each other, but had to work together to chase the murderer.
But the closer they get to the truth, the more unreasonable the case becomes - inconsistent testimonies, people who have died but reappeared, and the mastermind who seems to be always one step ahead of them, all lead them to the fire five years ago.
Until Qi Ye discovered that what was deleted that year might not just be a piece of surveillance.
There is another person who should have existed.
And this person may never really disappear.
