Every school has some unknown secrets, and maybe every school will have a group of curious people to explore these secrets.
Two years ago, a boy named Cheng Ziyang disappeared mysteriously, and Blue Maple College announced that he had drowned. Two years later, an identical face appeared in front of everyone's sight, causing that gray memory to come flooding back.
And Hei Cha, who had not taken a case for two years, also started to handle the case, because since Cheng Zishuo, Cheng Ziyang's younger brother, appeared, one after another bizarre things happened. Are these coincidences or premeditated?
As the cases are solved one by one, this mysterious veil is gradually unveiled layer by layer. What's even more surprising is that he is the mastermind behind these bizarre cases?