Echoes of the Abyss: Crime Puzzle

When criminal police captain Lin Feng was investigating a series of serial murders, he found that all the clues pointed to the unsolved case that he personally closed five years ago. As the investigation deepens, he gradually realizes that there is an amazing conspiracy hidden behind the "truth" of the year, and that he may be just a pawn on someone else's chessboard. When more victims appear, Lin Feng must uncover the mystery of the crime that spanned five years under the dual pressure of being framed by the mole and the real murderer escaping.