A series of suicide cases on a rainy night broke the peace of the city. The deceased all left the same strange last words before their death - "I saw endlessness." During the investigation, detective Jiang Chen accidentally discovered that he could sense the remaining "illusion fragments" of the deceased. These fragments, like puzzle pieces, gradually pieced together an "infinite illusion" that overlapped with reality but was full of despair. As the investigation deepened, Jiang Chen discovered that the illusion not only swallowed ordinary people, but was also related to his sister who disappeared ten years ago. In order to find his sister and uncover the truth of the illusion, he was forced to shuttle between reality and illusion, and face the greed, fear and redemption of human nature. In this process, he must not only fight against the "obsession monsters" that breed in the illusion, but also be wary of the mysterious organizations hidden around him, and he must keep his true heart when he is lost again and again, otherwise he will become the next "sacrifice" of the illusion.
