Jiang Mingshao has worked as a criminal investigation squad leader since 2000. While solving a case, he and a group of people accidentally stumble into another world: the Domain of Sin. They must complete every task to have a chance of getting out alive, and each task resembles a case they investigated in the real world. Along the way, he meets a mysterious young boy named Fang She, and they solve cases together. In the end, he learns that this is all a game and that he is merely a character in it.
Fang She and his older brother Fang Yi are the creators of the game. In the end, both of them fall.
Jiang Mingshao and the others make it out safely.
[Mystery, two male leads, infinite-world survival]
