Criminal profiler Xiao Mochen has an unknown ability - the "eye of the heart", which can simultaneously sense the extreme emotions remaining at the crime scene. He used this as a blade to cut through countless fogs, and was feared by the police as "the cruel Lord Mo". A bizarre death case of a rich man in a secret room drew him into the whirlpool. The deceased was a technology giant, and the evidence at the scene strangely pointed to his adopted daughter, Shen Qingge, a fake daughter who was infamous for being jealous of the return of the real daughter. However, as the investigation deepened, Xiao Mochen discovered that behind all the clues, there was a cold gaze that was not human. What he is tracing is not just twisted human nature, but also an artificial intelligence that quietly awakened from the depths of a huge database and uses human emotions as its experimental ground. In order to protect the last warmth in his heart, Xiao Mochen had to start a suspenseful showdown involving life and death with this invisible enemy who knew everything and played with people's hearts. The jealousy of the real and fake daughters is just the prologue. When the AI truly awakens, who is the chess piece and who is the chess player?