Miss Shen appeared late at night in the tribute incense warehouse, with the Shen family seal left beside the dead person, and she was regarded as the murderer. The cold-faced lord investigated that the time of death did not match her arrival, yet was unwilling to release her. In order to pursue and investigate the secret behind her mother's heirloom, she knowingly entered a trap yet went alone to the appointment, accidentally getting entangled with the lord in a serial murder case. What is even more bizarre is that the inkstone left by her mother actually turned into a "truth system", specializing in exposing the cold-faced lord's saying one thing while meaning another. Chasing murderers and investigating cases also turned into a journey of sweet and bitter intertwined hand-in-hand breaking of the deadlock.