When the echoes of sin resound, who can hear the truth crying in the darkness?
The tough-guy detective Du Feng believes in the supremacy of evidence, but he has reached an impasse in a series of serial murder cases with a strong sense of ritual. Until he met Su Zimo, a genius criminal psychologist - a man who can see into the abyss of people's hearts, with clear eyes but carrying a secret past.
When Su Zimo met Du Feng for the first time, he said bluntly: "Captain Du, you have a beast in your heart."
Du Feng discovered that this seemingly weak expert could always accurately break through the most gorgeous disguises of criminals.
Rainy Night Tailor, Undercurrent Poetry, Mirror Killing Game, Heart-Purifying Movement, Reflection Mystery Game... One after another strange crimes occurred, and each murderer was like a puppet controlled by invisible hands, performing a twisted "ritual" on the urban stage.
Why do every scene leave hidden symbols pointing to the past?
Why does every dead soul become a cruel sacrifice to the darkness?
Who are those eyes hiding behind all crimes?
As the investigation deepened, Du Feng and Su Zimo discovered that all the clues ultimately pointed to a common shadow - the mastermind behind the scenes who called himself "Mr. Echo". He is not only designing a crime, but also orchestrating a deadly game against the two protagonists.
This is a battle of faith and a redemption that looks straight into the heart.
The two heroes join forces to pursue the source of the echo in the fog and lies, from suspicion and temptation to life and death dependence. When the final darkness falls, they must tear apart all disguises in order to stop a final judgment that will annihilate humanity.
