Nangong Tianming and Shangguan Jing accidentally traveled to a parallel world with a modern background but where ghosts were rampant. They died as soon as they crossed over. Fortunately, there was a system to help them. They came to a small town shrouded in fog, where bizarre murders related to nursery rhymes occurred one after another. A mysterious evil organization secretly controls the protagonist's investigation and attempts to cover up the truth. If the protagonist cannot unlock the secret of the nursery rhyme, not only will he lose his life, but he may also plunge the world into a greater crisis.
During the investigation, the protagonists were newcomers and lacked abilities. Strange events often affected their judgment. They were also misunderstood by the villagers as the ones who caused disasters. The investigation was difficult. At the same time, a mysterious existence unexpectedly appears and knows many secrets, but also brings more mysteries. The protagonist does not know whether he can trust it, and is forced to choose a difficult line between trust and suspicion.
Every time the nursery rhyme is played, there will be a new victim, and the protagonist must find clues before the next time the nursery rhyme is played. In this foggy and eerie town, they face an existential crisis. In the face of the temptation of interests, the protagonists stick to the bottom line of justice and do not collude with evil forces. In the end, the protagonists solved the mystery, only to find that the truth behind it was heartbreaking, but it also came at a huge price.
Really not bad