Lin Mo, a genius mathematician, was involved in a carefully planned serial murder case, and all evidence pointed to him.
The murderer marked the corpse with mathematical symbols, used a total lunar eclipse to create a perfect alibi, and even weaved the truth about the fire at the "Angel Orphanage" ten years ago into a bloody revenge code.
In order to prove his innocence, Lin Mo teamed up with criminal police captain Shen Yuqing to investigate. Each body is a "puzzle piece", and all the dead are related to the fire that swallowed 34 children. The manipulator behind the scenes, "X", accurately predicted every step of their reasoning, as if Lin Mo's thinking mode had already been written into the algorithm.
When Lin Mo discovered that the gaps in his childhood memory overlapped with "X's" revenge plan, the truth became more and more ferocious - it turned out that the beginning of this death game was doomed as early as that rainy night twenty years ago. And the target of the last puzzle piece of "X" is Lin Mo himself...
