Lin Yeqing and Jiang Muxiao were bound by fate due to a blood contract ceremony, and their souls are connected to each other. If anyone betrays them, they will suffer backlash. They were once the most tacit partners of the police, but now they are suspicious of each other at every murder scene. Under the blood contract, memory can be tampered with, and trust has become a curse. When the corpse contained each other's fingerprints and the only secret word that could unlock the spell appeared on the evidence - and that secret word was known only to Lin Yeqing and Jiang Muxiao - they realized that what they really wanted to kill was not the victim, but each other.
