Lu Zhiyan was not born to be a detective. He was once a professor of criminal psychology at a top university. He lost everything because of his involvement in a carefully designed unjust case. On the road to self-redemption, he discovered that behind all the unsolved cases, they seemed to point to a legendary "Dark Apocalypse" that recorded 100 perfect criminal methods in human history. His battle is not only to capture the murderer, but also the ultimate game with the compiler of this "crime textbook" and his disciples.