Shen Yanxin, a scholar of folk symbols, unexpectedly received a strange "midnight videotape" recording a theater fire in the 1940s. Viewers must relive the tragedy of the fire within seven days. Possessing the power of the "Symbol Decoder" inherited from his family, he was forced to interpret the changing opera masks in the video: red-faced redemption, white-faced resentment... Anti-violence routines, he went deep into the dusty past, and joined forces with the owner of the antique shop Wu and the police officer Zhong Wan to pursue the obsession of the unburied souls. When the truth of the fire lies in the remains and ashes
