A strange invitation, a mysterious and powerful organization, a thrilling and dangerous adventure. The truth is always scarier than you imagine. Detective boys, fellow spies, agent knights, pet ferrets... All kinds of people with special identities and unknown purposes gathered at Shieryun School. At midnight, a strange flute sound came from the dry well on the campus; ancient text clues were left on the dusty desks; a bizarre video tape hidden in the dark depths... All of this revealed an astonishing secret. The distorted reality, the buried truth, all clues point to that impossible person in an instant. Who is she? Who is he? Who is myself? True and false, complicated, who is the embodiment of justice?
