In the near future, human memories can be extracted and sealed as "memory crystals" and become the most absolute evidence in court. Shen Jingzhou is the most famous memory interrogator in Xinghai City. He can sneak into the depths of anyone's memory and glimpse the most secret truth. He firmly believes that the data does not lie, until he takes over a murder case that seems to be irrefutable. In the deceased's memory, the murderer's face was clear and his motive was clear. However, Su Wanying, the murderer's sister, insisted on her brother's innocence in an almost paranoid manner, and used logical loopholes in reality to challenge the "reality" Shen Jingzhou saw. When Shen Jianzhou found a trace of deliberately forgotten traces that did not belong to the deceased in the reflection of his memory, he was shocked to realize that what he had glimpsed might not be the truth, but a carefully woven lie. It turns out that the most dangerous thing is not forgetting, but tampered memories.